Question about score shooting..

J

Jhart

Guest
I was looking at the lapua web page and i seen there making 7.62x39 cases..
Why dosn't anyone shoot this in score? its almost the same as the 30ppc with no case prep right... again just wondering.

later
jim hart
 
I used to get 2900 out of a BIB 112 with a 30PPC, the 7.62x 39 is a tad smaller.

Seems logical, doesn't it. I guess the only way to really find out is get a reamer, chamber up a barrel, and see what happens. The steep body taper might give a few problems, but the Beggs line of chamberings, (22 and 6mm Beggs), uses the same case taper, and by all accounts, shoot great with little problems.

4227 would be ideal in it........jackie
 
Jim, I've been shooting a my 30 Major since 2007. It's a 6.5 Grendel necked up to 30. The case holds about a grain more than the x39. That puts it almost smack dab between a 30ppc and a 30BR. It uses a ppc bolt face. Lapua makes the Grendel brass and it uses SR primers and also has the small flash hole. It's worked wonderfully for me. I'm not aware of any currently produced x39 brass that uses small primers and small flash holes, for what that's worth. I have dies available and it's as simple to form brass for as is a 30BR. I have little doubt that the x39 with good components, will shoot well though...or even the x39 improved. I'm convinced the 30 Major shoots just as well as anything out there. It has it's pros and cons like anything else, but it's biggest attribute is that it fits a ppc bolt and it shoots.--Mike Ezell
 
I think i might just try the 7.62x39 just for the simple fact that im lazy and i dont like making brass..

Another question how long has Lapua made 100gr 30cal bullets, are they any good?
 
Jhart said:
I think i might just try the 7.62x39 just for the simple fact that im lazy and i dont like making brass..
Click to expand...

Making the brass is easy compared to the hassle you are gonna go through to go that route. You are going to need a custom reamer and dies and probably end up with a really good shooting rifle that is almost competative.
 
Jhart said:
I think i might just try the 7.62x39 just for the simple fact that im lazy and i dont like making brass..

Another question how long has Lapua made 100gr 30cal bullets, are they any good?
Click to expand...

The only brass prep is expanding and turning the necks. I do have a no turn reamer too though, and can fit the die with a tapered expander that will produce a piece of brass, ready to load with a single pull of the handle. I wouldn't recommend it for competitive BR though;). I use it for gas gun chambers where they just want easy and functional as their main objective. As for the Lapua 100 grainers...I've tried them and couldn't get them to shoot very well.--Mike
 
Jim, I would strongly advise against using the Lapua 7.62X39 for building a competitive .30 cal. Score gun.

Good shootin'. -Al
 
Al Nyhus said:
Jim, I would strongly advise against using the Lapua 7.62X39 for building a competitive .30 cal. Score gun.

Good shootin'. -Al
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Me too, I know a fellow who made one and it doesn't quite get er done! Pretty hard to beat the reguler ole 30 BR. Powder selection keeps all of us locked up in boxes. If I ever get another reamer I will go for thicker necks, however.
 
What you want is a no turn neck 30BR unfortunately, when you neck 6BR up to 30BR you get a thick ridge at the bottom of the neck at the shoulder. I guess a reamer could be cut accommodating this but I am not at all sure that would be a good idea, at least I know of no one who has tried it. Your 7.62x39 thought is most likely based on the extreme similarities between it and the 30BR. That is why I previously said it will probably shoot very well. But I believe it will be like the 6BR and the 6PPC the 6BR is a great all around cartridge excelling at 600-100yds but I don't think it has ever won a Supershoot it just leaves a little too much off the table.
 
Obviously, I'm not the typical "follow what everone else does" kind of man. True, it's hard to beat a 30BR. I've been fortunate enough to beat some pretty good ones, and be beaten. What we KNOW is, that if you don't try to beat the BR, you won't beat it. --Mike
 
As the case capacity gets smaller on these .30's, the numbers of useable powders diminishes pretty quickly. A 7.62X39 is considerably smaller in case capacity than a 30PPC.

Those that wish to, may connect those dots accordingly.......;) -Al
 
mwezell said:
Obviously, I'm not the typical "follow what everone else does" kind of man. True, it's hard to beat a 30BR. I've been fortunate enough to beat some pretty good ones, and be beaten. What we KNOW is, that if you don't try to beat the BR, you won't beat it. --Mike
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I am a bit like you I think Mike in that I like "Different" stuff; including rifles. I had a 30-284X 1.650" made a few years ago. The rifle shoot wonderfully and there aren't many others around like it but it was costly and a lot of work making all the cases I have made over the years. It won't do anything my 30-44's will do or 30x 47's will do but it's different. I think I am finally getting over that sort of thing and realize now that it's mostly about Great barrels and bullets.
 
Pete Wass said:
I am a bit like you I think Mike in that I like "Different" stuff; including rifles. I had a 30-284X 1.650" made a few years ago. The rifle shoot wonderfully and there aren't many others around like it but it was costly and a lot of work making all the cases I have made over the years. It won't do anything my 30-44's will do or 30x 47's will do but it's different. I think I am finally getting over that sort of thing and realize now that it's mostly about Great barrels and bullets.
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I agree about the good barrels and bullets, Pete. Also, I contemplated a shortened 30-284 for a while. The trouble of making the brass was more than I wanted to deal with.--Mike
 
I checked the water capacities and this is what I got. The 7.62x39 was an unfired Remington peice of brass. The rest was fire formed Lapua.

7.62x39------34.0 gr (new unfired Rem.)
30 PPC-------36.0 gr
30 Major------38.5 gr
30 BR---------41.4 gr

I checked a new unfirerd piece of Lapua 30 Major brass. It held 37.3 gr. So IF the x39 brass gains the same when fireformed, that puts it at 35.2 gr. Less than a grain smaller than the x39, albeit Lapua vs. Remington brass. The small thirties do like faster powders(4198 being on the slow end).--Mike
 
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Thanks for posting those, Mike. I think it gives a bit clearer picture of what we're talking about.

Based on those figures, here's how the cases measure up by percentage of capacity, using the 30BR as the 'zero' baseline with the %'s in red:

7.62x39------34.0 gr 82%
30 PPC-------36.0 gr 87%
30 Major-----38.5 gr 93%
30 BR--------41.4 gr -0-
 
Al Nyhus said:
Thanks for posting those, Mike. I think it gives a bit clearer picture of what we're talking about.

Based on those figures, here's how the cases measure up by percentage of capacity, using the 30BR as the 'zero' baseline with the %'s in red:

7.62x39------34.0 gr 82%
30 PPC-------36.0 gr 87%
30 Major-----38.5 gr 93%
30 BR--------41.4 gr -0-
Click to expand...

Al, it of course can also be viewed as evidence of the others being more efficient than the BR. Not to take anything away from the BR...It's a great cartridge, but what makes it the baseline...because it's what everyone else shoots? So, the BR is a great round and everyone shoots it. That doesn't mean it's the best......It doesn't mean it's not either. That's really getting into a whole different direction than the OP. I only posted the numbers for comparison's sake. As for the topic at hand, the BR doesn't really belong on the list. Also, the percentages don't reflect what I posted in the paragraph below the capacities, with regard to the x39 being new, and unfired brass. Thanks though.--Mike
 
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