Jackie..30PPC question

S

scootertrash

Guest
I had Dave grind me a .332 neck, zero free bore, 1.505 reamer for a 30PPC build. I believe that is the same as yours.

I am also aware of your blowout method to get cases. Therefore, we have built a blowout gun chambered in 6PPC using a no turn chamber. After firing in this blowout rifle, we are expanding up to .30 and turning the necks at that time for the .30.

We seem to be missing something though. My Lapua cases are only coming out about 1.468-1.470 in length. I had read where you said you are coming out around 1.500, and then trimming back to 1.495.

I'm considering sending the reamer back to Dave and have him regrind it to about 1.475. What are we doing wrong, are we missing a step somewhere? The virgin brass starts out about 1.515 out of the box.

Thanks for your time, and any insight is most appreciated.

Mike
 
Scootertrash, the problem is that you are fireforming in a 6PPC chamber and then necking up all the way to 30 caliber. The necking up is what is shortening the cases. If you wish to get full length cases, you need to fireform in a 30PPC chamber. Then the necking up is then but a few thousandths...

This can be done using in a number of ways. I use a dedicated 30BR or 30PPC fireform barrel, and pistol powder with a wad of paper towel on top to hold everything in. Jackie uses an old 6PPC barrel in which he has opened the neck up to .330", and uses a .22 pellet and some N133, I believe. Either way you need to be careful by working your way up to get the desired amount of forming.
 
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Mike

Hal answered your question. The reason is when you neck up from 6mm to 30, it will push the metal back, resulting in a short case.

I shoot a 220 Russian in my standard 269 neck 6PPC chamber, then I load the case with a standard 6mm bullet and about 28 grns of 133. I shoot this in a 6PPC barrel that has the neck reamed out to .330 . What comes out is a "factory" 30PPC, ready to neck turn.

This results in a case that is a tad over 1.500, and I trim it back for my chamber.

Lately, we have been using pistol powder, (ALLIANT #7), and cream of wheat to blow them out, and it works fine. It is messy as heck, though. But it does have the advantage in that you are not dealing with a bullet.



.......jackie,
 
Thank you Hal!

That makes sense. I'll try opening up the neck to .330 and then shoot a couple thru the blowout rifle.

I have sixty cases already expanded for the cheap 6mm bullets I'm using to fire form. I'm sure I'm still going to come up a bit short since you fellows seem to both be starting with a .22 pill. (they measure 1-497-1.500 after expanded to 6mm) I'm wondering if I should start anew, or if these will come out close?

I guess I can shoot a few after I get the neck opened up, and hopefully they will be in the 1.490-1.495 range.

Thanks for showing me the err of my way. I really do appreciate the help.

Mike
 
Thank you too Jackie, you must have been typing the same time I was. Thank you for your time.

Mike
 
Jackie and Hal...just wanted to let you know the forming went very well.

Since I only have one barrel available to use as a blowout barrel, I'm only shooting once. For my situation, I found shooting the virgin brass loaded with a .22 bullet, and the neck area opened up to .330, my brass comes out at 1.492-1.495. I'll trim to 1.490...not quite as long as yours Jackie, but I think they'll work fine.

I'll pull the other sixty bullets I had already expanded and loaded with 6mm bullets. I'll turn those cases and just use them in my 6PPC.

I plan on trying Alliant's RL7 in this cartridge. Have either of you ever gotten around to testing it?

Mike
 
I'm just wondering why you would go with a PPC case, and not the 30BR. I know the BR round is incredible...Is there some data on the 30PPC that I might look over? Thanks for your time and imput, good shooting, Gary
 
I think the most obvious reason is the PPC diameter case allows a gun with a PPC bolt face to be rebarreled with a 30 caliber barrel and be shot in score matches. My experience is with the 30 Major(grendel). It shoots fine and uses the PPC bolt face and has a little more case capacity than the 30 PPC. ---Mike Ezell
 
Gary

When I first started thinking of this, I pictured a chambering that would work with a regular PPC Bolt Face, (just screw on a barrel), and also lighten up the recoil enough to be more managable in a 10.5 pound Rifle. At the time, I was fully expecting the IBS to establish LV as a bona fide class. That has not happenned.

Plus, there are a lot of clubs that shoot a 100 yard score format, and this thing is deadly at 100 yards. With bullets in the 112 grn range at 2950 fps, it is very easy on thew shoulder.

I made some cases, and then had Dave Kiff grind a reamer to match.

True, it might be an answer to a question nobody asked, but I decided to develop it and see. I am pleasantly surprised. It is a real hoot to shoot, and will eat that X up.......jackie
 
jackie schmidt said:
Plus, there are a lot of clubs that shoot a 100 yard score format, and this thing is deadly at 100 yards.

, and will eat that X up.......jackie
Click to expand...

We shoot a version of "One Shot" matches here a couple times a month. The target is a 3/8" circle at 100 yards. We typically have fourteen shooters or so, everyone puts a dollar in the kitty, closest shot to the center wins the pot.

This is repeated for twenty matches, with the last one paying double. What makes this really intersting, we are shooting at 9100' ASL, and in every kind of condition imaginable, as we shoot year round. It may be ten to fifteen minutes before your next shot, and conditions are rarely the same as your prior shot, and the rifle is cold again as well. Yet it still takes an almost center punched shot to win the pot for any match.

I wanted something different, and have been interested in this chambering since Jackie started writing about it. I've been holding my own with a 6PPC, but there is something about a .308 bullet landing inside a .375 circle and leaving white around the edge that seems to pysch out the other shooters. ;)

Mike
 
scootertrash said:
We shoot a version of "One Shot" matches here a couple times a month. The target is a 3/8" circle at 100 yards. We typically have fourteen shooters or so, everyone puts a dollar in the kitty, closest shot to the center wins the pot.

This is repeated for twenty matches, with the last one paying double. What makes this really intersting, we are shooting at 9100' ASL, and in every kind of condition imaginable, as we shoot year round. It may be ten to fifteen minutes before your next shot, and conditions are rarely the same as your prior shot, and the rifle is cold again as well. Yet it still takes an almost center punched shot to win the pot for any match.

I wanted something different, and have been interested in this chambering since Jackie started writing about it. I've been holding my own with a 6PPC, but there is something about a .308 bullet landing inside a .375 circle and leaving white around the edge that seems to pysch out the other shooters. ;)

Mike
Click to expand...

That sounds cool.
I am curious about the 30PPC also. Mike and Jackie keep the posts coming.
Thanks Tim
 
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Mike...

scootertrash said:
We shoot a version of "One Shot" matches here a couple times a month. The target is a 3/8" circle at 100 yards. We typically have fourteen shooters or so, everyone puts a dollar in the kitty, closest shot to the center wins the pot.

This is repeated for twenty matches, with the last one paying double. What makes this really intersting, we are shooting at 9100' ASL, and in every kind of condition imaginable, as we shoot year round. It may be ten to fifteen minutes before your next shot, and conditions are rarely the same as your prior shot, and the rifle is cold again as well. Yet it still takes an almost center punched shot to win the pot for any match.

I wanted something different, and have been interested in this chambering since Jackie started writing about it. I've been holding my own with a 6PPC, but there is something about a .308 bullet landing inside a .375 circle and leaving white around the edge that seems to pysch out the other shooters. ;)

Mike
Click to expand...

if you allow 30PPC true bench guns and shooting off front rest and rear bags the whole 3/8th" circle will be gone in 4 or 5 shots...if it takes that many!
 
Yes sir,

you are correct, it would be gone. ;)

If a shooter's shot is close, the match director moves the next shooter to a clean target. There are twelve targets printed on one sheet, and shots are taken in rotation. About a third of the matches need measuring devices to determine the winner, and generally you need at least a half bullet inside the circle to have a shot at winning.

We have a few other rules as well. All rifles have to be built on a factory action. Most use 40X or 722 actions. You may do as much work as you like to true the action. Any trigger is allowed, and most use 1-1/2 oz. Jewells. The stock can't exceed three inches at the fore end, and muzzles have to be one inch or less. Any glass is legal. Ninety-five percent of the calibers are the usual suspects, PPC, 30BR, and 6BR.

If any of you folks are in the Divide, Buena Vista, or Kremmling, Colorado areas, stop by. We also shoot both 100 and 200 at Buena Vista and Kremmling. My home club is the Divide club. We will occasionally do a group shoot at the end of the regular matches as well.

We have shooting houses with woodburners for shooting in the winter, and there is usually a pot of chili or gumbo sitting on top the stove. We'll never be in the same league as the fine folks here, but the competition is good...and there are a few good shootin' rifles here.

Mike
 
I see.

scootertrash said:
you are correct, it would be gone. ;)

If a shooter's shot is close, the match director moves the next shooter to a clean target. There are twelve targets printed on one sheet, and shots are taken in rotation. About a third of the matches need measuring devices to determine the winner, and generally you need at least a half bullet inside the circle to have a shot at winning.

We have a few other rules as well. All rifles have to be built on a factory action. Most use 40X or 722 actions. You may do as much work as you like to true the action. Any trigger is allowed, and most use 1-1/2 oz. Jewells. The stock can't exceed three inches at the fore end, and muzzles have to be one inch or less. Any glass is legal. Ninety-five percent of the calibers are the usual suspects, PPC, 30BR, and 6BR.

If any of you folks are in the Divide, Buena Vista, or Kremmling, Colorado areas, stop by. We also shoot both 100 and 200 at Buena Vista and Kremmling. My home club is the Divide club. We will occasionally do a group shoot at the end of the regular matches as well.

We have shooting houses with woodburners for shooting in the winter, and there is usually a pot of chili or gumbo sitting on top the stove. We'll never be in the same league as the fine folks here, but the competition is good...and there are a few good shootin' rifles here.

Mike
Click to expand...

Thanks
 
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