What would be the best twist and barrel length for a cast bullet bench gun in 7.62x39 with bullet weights 150 to190 grain bullets.
Also, the same question for the 6x47 with bullet weights 100 to120 grains. What is the difference between the 6x47 and the 6x47 Lapua.
It's not like I have nothing else to do, but these questions just seem to pop up every so often. Please don't say anything to the wife, or she will find something for me to do.
Thank
mrbill2
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My H&R 7.62x39 Handi Rifle has a 1/9.75” twist. It shoots the Lee CTL312-160-2R very well. Almost MOA. I may use it in a postal match this year. You might check out the current crop of bolt action 7.62x39s and see what people are saying, regarding twist. CZ makes one, I think Ruger does and maybe even Remington. I'd love to see a 6x47 accessory barrel from H&R. I'm on a tight budget.
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What would be the best twist and barrel length for a cast bullet bench gun in 7.62x39 with bullet weights 150 to190 grain bullets.
Also, the same question for the 6x47 with bullet weights 100 to120 grains. What is the difference between the 6x47 and the 6x47 Lapua.
Thank 1-10 th 1-12 should work with the 30-39 , 30 Kern A 6 x 47 is formed from 222 Rem. Mag cases. A 6 X 47 Lapua case is close to a 250/300- Savage in case Vol.
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mrbill2: There are 2 6x47's. One and the oldest is the 6x47 made from the 222 Rem Mag case and was used in Bench Rest comp in the late 60's through about 74 when the 6PPC took over the win column. The other 6x47 is one that was pretty popular in the early 90's until the 6BR came out, made from 243 cases and shortened, at least mine was. I shot BR comp with a 6x47 (222Rem mag) and tried to convert it to a 80 grain LBT spitzer. My 6x47 had a Shilen 14” twist and after 800 rounds or so finally got the 80 grain bullet to strike point on at 2800 fps plus. Not too enjoyable to shoot. I now have taken that rifle apart put a new take off barrel with a 9.5” twist on that L46 Sako action and back in the original stock chambered to 6mm x 222 Rem. Really looks neat. Just finished it 3 weeks ago and am having a “blast". It seems to shoot all of the loads I have tried well. If you have continued interest I will report back in a week or so with groups and other shooting data. Reg
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In my XP-100's I've used a 30 Kern (based on Lapua 7.62 x39 case) and 30 PPC (necked-up 6 PPC or 220 Russian). Bullet weights were 160-180 grain. Also had a 30 BR on the gun for awhile. The 30 BR was a Shilen 1:10 and the Kern and PPC were 1:12 Lilja. Just put a new 1:10 twist barrel on the XP for 30/223 but have not yet shot it. Bullet weight will be 165-170.
Tom
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Gary
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Well, first off I must admit I made a mistake with the 6x47 when I bought the used set of dies. I was seeing one thing and reading something else. Dies turned out to be 6x45. So that puts the question about 6x47,s to rest. I have a chance to buy a Remington 799 in 7.62x39 with a 20” barrel. So now I must deside if I want rebarrel one of my Savage's to 7.62x39 or buy the Remington. Thank fellows for your help.
mrbill2
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Your choice between a Rem 799 and re-barreling one of your Savages would be clear to me if it was my choice. The 20 inch barrel on the Rem would not constitute a bench rifle barrel length for me.. If the Savage could be fitted with a 24 inch heavy barrel, that would be my first choice. A 24 inch sport weight barrel would be my second choice, but I'd never go down to 20 inches for a cast bullet bullet bench rifle, hunting rifle...maybe 20 inches.
I don't know why the use of carbine length barrels for the X39 cartridge has gotten popular, but I believe it is the wrong direction for a bench rifle.
My experimenting with Spartan Rifle in X39 continues. Currently I am developing a Squirrel load and it is going well with the Lee TL314-90-SWC bullet in #2 alloy sized to .3125” and tumble lubed with 45:45:10 Recluse. My charge is 3.1 grains Hodgdon Titegroup for about .22 rim fire velocity and the load produced 3 five shot groups under 1/2 inch at 50 yards just yesterday at the range. I like the little X39 cartridge. The Spartan is not a light weight at 8.5 pounds, and the 24 inch chrome lined bore loves cast bullets. I worked the trigger down to 3 lbs and It shoots for me.
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Agreed , the 799 is “just” a rifle, and probably comes with a .312 bore, and not the standard .308. More important, is what bolt face your Savage has, if it is a bolt face for the 308 family, then the extractor MIGHT grab the 30-39 case rim. The other option would be a 30 BR. If it's a 223 family bolt face then something based on the 223 case, 300/221, 30/222 or 30-223, 30 x 47.
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Gary,Wayne You convinced me will not be buying the Rem. 799. After some more searching on the computer I found this to handle the bolt face.
mrbill2
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I had a smith convert a Savage in 223 to a 6.5BPC . that has the same Bolt face dimensions as a X39. He filled the extractor-spring-pit, and then re drilled it in a slightly further location. with the face opened up and a 308 extractor it works FLAWLESSLY. The 223 internal box magazin also feeds the cartridge ( after a slight wrestling match with a set of Prying Pliers.)
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Looks like good choices. I'd go right for the full length Bull Barrel!
Gary
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sluggo
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Eddie Southgate
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Capt. Moroni Hunt
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John dumbar
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