The barrels TJ cal. 25 have a twist of 1/14, that is a faster turn than 1/16 of LW.But in cal. .30 the rotation of the TJ cannon is 1/26 which is much slower. What is the reason?
My Marauder can do 960 with one valve spring tied behind its back, and I want to try slower twist anyway. I may have to see if I can convince AAA to let me in on buying a 42"-er.cheers,Douglas
Quote from: PakProtector on December 27, 2019, 10:34:40 PMMy Marauder can do 960 with one valve spring tied behind its back, and I want to try slower twist anyway. I may have to see if I can convince AAA to let me in on buying a 42"-er.cheers,DouglasOr buy one of the fx barrels....
Yep that’s the route I’d take. Pretty low cost if just buying a barrel. Pretty sure we’ve all seen what the .30 FX barrel is capable of.
Quote from: mackeral5 on December 27, 2019, 11:44:31 PMQuote from: PakProtector on December 27, 2019, 10:34:40 PMMy Marauder can do 960 with one valve spring tied behind its back, and I want to try slower twist anyway. I may have to see if I can convince AAA to let me in on buying a 42"-er.cheers,DouglasOr buy one of the fx barrels....I will give up air gunning before I deal anything FX.cheers,Douglas
I can't imagine building a 7mm with purposely a low enough power to require a light slug.... but I suppose it could be done.... I'm guessing the .30 cal FX slugs will be under 60 gr.... but I could be wrong.... That guess is based on the lack of commercially available .30 cal PCPs over 100 FPE, let alone 120....Bob
Quote from: rsterne on December 30, 2019, 12:36:22 AMI can't imagine building a 7mm with purposely a low enough power to require a light slug.... but I suppose it could be done.... I'm guessing the .30 cal FX slugs will be under 60 gr.... but I could be wrong.... That guess is based on the lack of commercially available .30 cal PCPs over 100 FPE, let alone 120....Bob I don't know if this can be done, but with smaller caliber coupled with the available power I was thinking of not lowering the power, but utilizing air pressure and volume to produce a slug speed close to 1300 FPS at the muzzle. At 100 yards a 65 grain slug is still moving 1087 fps and has 171 ft lbs. energy so it stays in a flight speed where it shouldn't be effected by going in and out of mach zones until nearly the 200 yard mark.