C
Changeling
Guest
Are these calibers realistically capable of serious competition at 1000 yards?
You must be joking...................................there are numerous records (including World Records) that have been set with the 6br and Dasher. One only has to look at the statistics to see. I believe that the 6x47 Lapua will become a new record holder once more people begin to use it. Though I used the 6BR in the past, I have a couple of 6x47 Lapua rifles in the works as we speak.
Mark, (ingrng)
I FINALLY got to shoot my new 6X47 based on a short-necked 6BR reamer.....I ran it up to almost 3300fps over the weekend........WITH the big ol' long-honkin' Euber 108's! I was running right around 3280 with a few peaking at 3300fps and she was running ragged. Stiff bolt lift, never did pop a primer but they were cratering bigtime. All thrown charges, 70degrees in the range house. Charges were varying 2/10 of a grain.
Actually that was just to find my max
28" Shilen barrel, TPE action and I happened to be using Rem 7 1/2's This reamer is throated to run the 108's clear down to the base of the neck. In other words, I've go lots of boiler room left! This is the HEAVIEST bullet with the LONGEST bearing surface using the SMALLEST case capacity. This was my Skunk Test.......Even the 115's will make more velocity.
H4350 pushes the Euber 108's comfortably at 3200 flat. 3250 is too warm, primer pockets only last 5rds (altho with proper seasoning I MIGHT be able to hold here as it's right at the pressure signs of the 6BR running 2900 out of a 26" bbl) The big Eubers make pressure a little earlier than the others....................... 3200fps flat is no crater, nice bark and RIGHT where I wanted to be with the long barrel. NO push, NO hard bolt lift, just smooth and easy. The FF load is also at 3200 and the bolt just flicks open. I expect to be able to cruise any bullet up to the Berger 115 right here around 3200. I actually got 350fps COMFORTABLY over the 6BR. My 6BR's are COMFORTABLE with the Eubers at 2850 out of my normal 26"bbl......2900 is doable but HARD unless I throat wicked long and season the brass well with fast powder.
Because this rifle is throated with an .060 compound taper freebore I expect the Sierra/Lapua/Berger line of 105/107's to make an extra 50fps comfortably. So it'll be an EASY 3200fps gun with expectation of 3250 using Bergers and such.
Right on the button! In fact with the H4350 I've got 50fps more than I expected. These cases take pressure JUST like the 6BR's do......like a ROCK! I spent 8hrs Sat making my 150 cases for the upcoming shoot.
I also ran a series using VARget, it's too fast. I pressured out before the powder got up into the shoulder and only made 3185 before seeing pressure. I did run a set of 5 cases at 3200 but it was too hot, I junked the cases after the third firing. Never did leak or bust a primer but I was really-really close
I'll just betcha' though that the VARget will scream the 88gr Berger LD's at 3600+++.............. I'll definitely be considering a VARget load for vaporizing furballs........
As soon as I can I'll do a complete writeup on the pleasures and perils of using a 6BR reamer for the 6X47L.........it's doable and mine is "almost perfect" but this is my 5th 6BR reamer. The key is to use a shortened neck 6BR reamer. I set mine at 1.530 and I'd go down to 1.520 next time.....
Also I'm not completely happy with my choice of .268nk, the 6.5 brass didn't thicken up as much as I planned. I MAY order another 6BR reamer with a .030 short neck ground to .266 or .267..............
BTW, the brass doesn't hardly show a visible bulge at the base, you've got to really LOOK to see it, I have to spin the cases under strong light to cull them for eccentricity!
.500 BC at 3200fps .................... yeahhhh, it'll reach a K!!!!!
LOL
al
I FINALLY got to shoot my new 6X47 based on a short-necked 6BR reamer.....I ran it up to almost 3300fps over the weekend........WITH the big ol' long-honkin' Euber 108's! I was running right around 3280 with a few peaking at 3300fps and she was running ragged. Stiff bolt lift, never did pop a primer but they were cratering bigtime. All thrown charges, 70degrees in the range house. Charges were varying 2/10 of a grain.
Actually that was just to find my max
28" Shilen barrel, TPE action and I happened to be using Rem 7 1/2's This reamer is throated to run the 108's clear down to the base of the neck. In other words, I've go lots of boiler room left! This is the HEAVIEST bullet with the LONGEST bearing surface using the SMALLEST case capacity. This was my Skunk Test.......Even the 115's will make more velocity.
H4350 pushes the Euber 108's comfortably at 3200 flat. 3250 is too warm, primer pockets only last 5rds (altho with proper seasoning I MIGHT be able to hold here as it's right at the pressure signs of the 6BR running 2900 out of a 26" bbl) The big Eubers make pressure a little earlier than the others....................... 3200fps flat is no crater, nice bark and RIGHT where I wanted to be with the long barrel. NO push, NO hard bolt lift, just smooth and easy. The FF load is also at 3200 and the bolt just flicks open. I expect to be able to cruise any bullet up to the Berger 115 right here around 3200. I actually got 350fps COMFORTABLY over the 6BR. My 6BR's are COMFORTABLE with the Eubers at 2850 out of my normal 26"bbl......2900 is doable but HARD unless I throat wicked long and season the brass well with fast powder.
Because this rifle is throated with an .060 compound taper freebore I expect the Sierra/Lapua/Berger line of 105/107's to make an extra 50fps comfortably. So it'll be an EASY 3200fps gun with expectation of 3250 using Bergers and such.
Right on the button! In fact with the H4350 I've got 50fps more than I expected. These cases take pressure JUST like the 6BR's do......like a ROCK! I spent 8hrs Sat making my 150 cases for the upcoming shoot.
I also ran a series using VARget, it's too fast. I pressured out before the powder got up into the shoulder and only made 3185 before seeing pressure. I did run a set of 5 cases at 3200 but it was too hot, I junked the cases after the third firing. Never did leak or bust a primer but I was really-really close
I'll just betcha' though that the VARget will scream the 88gr Berger LD's at 3600+++.............. I'll definitely be considering a VARget load for vaporizing furballs........
As soon as I can I'll do a complete writeup on the pleasures and perils of using a 6BR reamer for the 6X47L.........it's doable and mine is "almost perfect" but this is my 5th 6BR reamer. The key is to use a shortened neck 6BR reamer. I set mine at 1.530 and I'd go down to 1.520 next time.....
Also I'm not completely happy with my choice of .268nk, the 6.5 brass didn't thicken up as much as I planned. I MAY order another 6BR reamer with a .030 short neck ground to .266 or .267..............
BTW, the brass doesn't hardly show a visible bulge at the base, you've got to really LOOK to see it, I have to spin the cases under strong light to cull them for eccentricity!
.500 BC at 3200fps .................... yeahhhh, it'll reach a K!!!!!
LOL
al
Al,
Sounds like it's working for you!
I've yet to see my barrels, but the reamer and "go" gauge is in hand. I've also acquired a McMillan "Edge" BR stock ready to inlet for the Remington short action. I hope to have the rifle ready for the August match.
Your reloading results will be welcome as Hell, as I haven't even begun to think about powder and chargesw. I do have 500 of the Berger 105 gr. bullets in hand!
Keep the data comin'!
lngrng
Sounds like it's working for you!
I've yet to see my barrels, but the reamer and "go" gauge is in hand. I've also acquired a McMillan "Edge" BR stock ready to inlet for the Remington short action. I hope to have the rifle ready for the August match.
Your reloading results will be welcome as Hell, as I haven't even begun to think about powder and chargesw. I do have 500 of the Berger 105 gr. bullets in hand!
Keep the data comin'!
lngrng
Mark,
At this point I'd just GO WITH The Pumpkins recommendation and get'cherself some H4350.......the fit is perfect, in fact I was compressing the last few grains of my load workup using the Eubers.....by the time I hit MAX I was really trickling slowwww and really crunching. It took two thou tension to hold the bullets back
PERFECT load density....... I won't probably even try another powder for a few hundred rounds.
BTW, bugholes at 3200........ I had three on target @100 Sat when my wife checked in for something, I talked for 2-3minutes and went back to the paper.........got them both in the same hole too, a quarter inch away
Did you shoot Sat???? It wasn't a joy!
I'm swagging you went with a .030 or so freebore with the Bergers?? If so, you'll be about halfway down the neck I'd guess......
al
At this point I'd just GO WITH The Pumpkins recommendation and get'cherself some H4350.......the fit is perfect, in fact I was compressing the last few grains of my load workup using the Eubers.....by the time I hit MAX I was really trickling slowwww and really crunching. It took two thou tension to hold the bullets back
PERFECT load density....... I won't probably even try another powder for a few hundred rounds.
BTW, bugholes at 3200........ I had three on target @100 Sat when my wife checked in for something, I talked for 2-3minutes and went back to the paper.........got them both in the same hole too, a quarter inch away
Did you shoot Sat???? It wasn't a joy!
I'm swagging you went with a .030 or so freebore with the Bergers?? If so, you'll be about halfway down the neck I'd guess......
al
J
Jay Idaho
Guest
Al,
Do you have any ES numbers from your tests? Is there an "extreme" version of H4350?
What would you do if you had a 6mm, 8tw, 31" Kreiger HV barrel? Go with 30" or cut it back a bit?
Jay
Do you have any ES numbers from your tests? Is there an "extreme" version of H4350?
What would you do if you had a 6mm, 8tw, 31" Kreiger HV barrel? Go with 30" or cut it back a bit?
Jay
Jay,
I wrote down a bunch of sets but didn't add anything up, I was really just finding out what this thing'll do. I was throwing the charges and as I recall ES was around 20+ fps. I'm only using a chrony ...
There were some issues though....I was using brass with all different neck thicknesses because I'd dinked around with my turner, then taken it apart, then dropped the silly little steel drive ball so now my neckturner cutter bit is driven with a micrometer riding on a spent primer then tried another die because the necks were swaging down crookedy.......and then another mandrel. I ended up with 5rds of XXX neck, 5 rds of XXX and 6 more cases with all different necks. All within a thou but not the same. I ended up shooting one set up to max with 4350 and throwing them away, then another set with VARget, tested to destruction also. Then a couple of cases that I loaded/fired/loaded until they keeled over........or didn't.
You know the drill.
I've got 5 seasoned "to try next time" rounds loaded up and 5 more loaded to another seating depth....... And I've got 150 cases turned and ready to FF and then trim to length..........I really won't be doing any ES testing until I've fireformed all 150rds. I don't see myself knowing anything A'tall before the June match, I'm just hoping to have a load dialed! I HATE to go into anything serious with my brass only once-fired......it ain't even steenkin' set yet, the shoulders are still rounded.
This 600yd stuff is a pain! I'm used to making 30 cases for a barrel and I'm DONE! I've got barrels here with over 2000rds thru them still running on original cases. In fact most of my "good" cases, PPC and BR cases have between 8 and 15 firings. They're just right
I called around last week looking for a place to weigh the rifle, looks like I'm gonna' hafta' drag it into the grocery store again.........
But she does steenking shoot so far! I did all of my testing shooting fitted neck style since I don't have any dies yet........some of the bullets I could seat with my fingers and some I had to use the arbor press and a 6BR seater....The brass was getting a little tight by the time it went south!!
Regarding the long barrel.......I guess I'd leave as long as possible. The huge case is still making velocity.......and the long flopper is easier to tune IMO, wider window anyway. I don't think you'll have an ES problem, this ain't no silly .308/250 case, it WORKS and hey, 3250 is a good place to shoot, just before she copper fouls......... as long as you've got a good die I don't see a problem wi'dat, making 3200+ that is..... I just dropped back to 3200 in my 28"er because I liked a round number, it would hang at 3220 or more even now.
al
I wrote down a bunch of sets but didn't add anything up, I was really just finding out what this thing'll do. I was throwing the charges and as I recall ES was around 20+ fps. I'm only using a chrony ...
There were some issues though....I was using brass with all different neck thicknesses because I'd dinked around with my turner, then taken it apart, then dropped the silly little steel drive ball so now my neckturner cutter bit is driven with a micrometer riding on a spent primer
then tried another die because the necks were swaging down crookedy.......and then another mandrel. I ended up with 5rds of XXX neck, 5 rds of XXX and 6 more cases with all different necks. All within a thou but not the same. I ended up shooting one set up to max with 4350 and throwing them away, then another set with VARget, tested to destruction also. Then a couple of cases that I loaded/fired/loaded until they keeled over........or didn't.You know the drill.
I've got 5 seasoned "to try next time" rounds loaded up and 5 more loaded to another seating depth....... And I've got 150 cases turned and ready to FF and then trim to length..........I really won't be doing any ES testing until I've fireformed all 150rds. I don't see myself knowing anything A'tall before the June match, I'm just hoping to have a load dialed! I HATE to go into anything serious with my brass only once-fired......it ain't even steenkin' set yet, the shoulders are still rounded.
This 600yd stuff is a pain! I'm used to making 30 cases for a barrel and I'm DONE! I've got barrels here with over 2000rds thru them still running on original cases. In fact most of my "good" cases, PPC and BR cases have between 8 and 15 firings. They're just right
I called around last week looking for a place to weigh the rifle, looks like I'm gonna' hafta' drag it into the grocery store again.........
But she does steenking shoot so far! I did all of my testing shooting fitted neck style since I don't have any dies yet........some of the bullets I could seat with my fingers and some I had to use the arbor press and a 6BR seater....The brass was getting a little tight by the time it went south!!
Regarding the long barrel.......I guess I'd leave as long as possible. The huge case is still making velocity.......and the long flopper is easier to tune IMO, wider window anyway. I don't think you'll have an ES problem, this ain't no silly .308/250 case, it WORKS
and hey, 3250 is a good place to shoot, just before she copper fouls......... as long as you've got a good die I don't see a problem wi'dat, making 3200+ that is..... I just dropped back to 3200 in my 28"er because I liked a round number, it would hang at 3220 or more even now.al