Alinwa 338 Lapua ???

I think alot of people are up late at night worrying about me as well.

Alinwa I was going to order up a Kiff reamer for the 338 Snipetac rod as I see he has them listed.Should I go with 0.020 0.030 or 0.040 longer on the neck length?
My primitive thinking on the neck length is the less gapspace you have the longer the throat will last because your heating the brass and not as much of the front of the throat.
Lynn
 
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Goodgrouper, I expect to shoot a case 50times without trimming. I can and have fired cases until the flashholes are burnt into weird shapes. Without trimming.

Lynn, I do this differently. I always figure that my cases will have some sort of a thickened/hardened/crookedy end on them so I take out 3-5 cases at random and fiddle with trimming to find out how far I need to go to clean up the shortest ones.

I order the reamer at this length. now I trim all my cases to just a thou or two less than this. Or trim to this length and let the chamfer give me my clearance. When I fireform I generally end up just a little shorter, sometimes if all is really clicking they stay the same. Without going into all the variations between different chambers and how I neckturn sometimes in two-three stages I try to end up with cases that are identical and have only about 5-8 thou of gapspace. I'll live with ten thou. Within two-three firings I'm beginning to cull by feel and can generally end up with 75% or so cases that seat bullets and resize with same-same pressure.

I further cull by inspecting for internal concentricity and lose some more cases (actually send them over to the sighter pile) and expect to get about a 50-60% yield of cases that pass muster for comp.

If my cases grew every firing I'd soon be in trouble!

I'm not advocating, selling nor trying to convince anyone of anything. This is just what I do. Today.

al
 
Alinwa
I'm kind of in a pickle as I don't have fully fireformed brass to go by to order up a reamer.It has less body taper and the shoulder is moved forward just like on a dasher.
Lynn
 
goodgrouper said:
Al, you wouldn't mind if I saved this quote to the archives would you? I mean this is classic stuff and needs to be remembered!:D
Apparently, Steven Hawking was right....................there are parallel universes where our laws of physics don't apply, and there are even a few people who live there! Amazing!:cool:
Click to expand...


you're welcome to save it if that's what blows your skirt up..... it's a free country.

I can assure you though that it's not hard to find references as I've been achieving this and writing about it for nigh on 15yrs.....

BTW, the term "archives" indicates that it's already being "saved." Wilbur keeps us covered. You could maybe save it in your favorites??

:p

al
 
Lynn said:
Alinwa
I'm kind of in a pickle as I don't have fully fireformed brass to go by to order up a reamer.It has less body taper and the shoulder is moved forward just like on a dasher.
Lynn
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Yup. you are :)

This is why my chambers are cut to substantially shorter than the brass.

al
 
goodgrouper said:
Yeah, they've been writing about dragons, unicorns, and mermaids for hundreds of years too, but as yet, no one has been able to collect a specimen.;) This is precisely why I say you need to quit typing and head on over to Tacoma and start competing. Show the world you've got the first dragon by the tail! You could be the next Tony Boyer!! Think of the fun you'd have telling all us NBRSA idiots how dumb we are for buying and using a case trimmer! Now wouldn't that be more enjoyable than just trying to impress of bunch of cyber folks that you'd seen a mermaid????
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I've never found it neccessary to tell people that they're dumb

al
 
Alinwa may be right on the non-competing part as of late but I think big changes are coming and coming sooner than most would think.On getting 50 firings out of the big cases I have some 50bmg brass with around 20 firings on it but none with over 30.
Lynn
 
goodgrouper said:
Then don't say a word. Just take your bag of secret tricks to a real match and clean house. After your exclusive abilities and exclusive knowledge win you a truck full of wood, then the "dumb" people you just beat will do all the talking. You can then at that point choose whether to dismiss them as unworthy of your secrets, or share with them what they have all collectively failed to understand in the 50 odd years of trying to make guns competitive in the NBRSA.:)
Click to expand...

Well since I've collected an inordinate pile of wood from the few 600yd matches I've attended I can only assume that you're one of those poor souls who believe that the only "real" matches are 100-200 6PPC group matches.

I don't know why I'm even saying like this, you win GG, you're right.

The mob generally is.

:)

al
 
GoodGrouper
Lets not got off on the subject of the nbrsa and verifiable results.I say that because once I start posting in those threads they get deleted very quickly for some reason.
I believe Al shoots nbrsa matches in Portland with Billy Copelind and Gary Noble.
Lynn
 
Lynn, thanx...... major derail going on here. Sorry I got pulled off, my bad.


You're going to have to take a SWAG and order the reamer. My only advice is to order the neck a little shorter than you think because you can always trim brass back but it's perty hard to make cases longer. I guess you could even order your HS gauge if you think you're good enough. Kiff can draw it up and get it close. I myself use feeler gauges while setting the chamber anyway so the relative size of the "Go-Gage" is kinda' moot. It's just a device to allow you to measure headspace easily.

If it were me I'd beg borrow or steal a 338 SnipeTac resizer and make up some cases... See how much it takes to clean up the end and then run 'em in to make the fireform shoulder where you want it and send them off to the reamer mfgr. The major problem I see is the one that plagues most of the "Improveds," your case is gonna' shorten a bunch. Your neck is going to want to pull back as the shoulder blows out. It's hard to make it hold......but it can be done, sometimes. I know nothing about this CheyTac brass.

I can get you some of the radii numbers and tell you how I do it if you're interested. I'd normally do it here but maybe I'll just email you.

BTW, why blow the shoulder forward? Do you think you'll gain velocity?

Are you planning on Alan Warner dies?
 
Alinwa
Al the guy making these things is Dave Viers at www.BlackDiamondRifles.com I have tried unsucessfully at getting in touch with him but will try again in the morning.
I will see if I can get him to not trim 3-4 cases and fire them 3-4 times and send them to me.I could then get Kiff to make me a reamer off of his dies and brass and make it a touch bigger all the way around so it extracts easily.
I picked up my action sunday night so now its the barrel wait time that will slow this thing down.
On moving the shoulder forward I want off the shelf reloading dies and I can get them from Black Diamond for the snipetac.I can then have Kiff reverse engineer the reamer for a good fit.I tried the high end dies and was very unhappy with the whole thing.
Lynn
 
BTW Lynn, it looks as though 408 length mags are becoming available. At least the prickly 'tac' gun builders are supplying a repeater.

al
 
I just looked at that Viersco stuff, the dies too. I agree totally, I'd get one of those dies in my hand first of all and have Dave work off the die......

I'll also agree re the "high end die" mess. Just because you pay a guy huge does NOT mean he knows what he's doing.

50reloads.....ba-da-BING

and straight cases..... ba-da-BOOM!

might could work


al
 
Goodgrouper
I'm not worried about You and Alinwa mixing it up I worry about posts mentioning the nbrsa.If I post on them they get deleted.
Lynn
 
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