WebJul 12, 2004 · I've seen Progressive Gain Twist rifling on rifle barrels advertised as extended wear, PGT rifling pistol barrels by (I think) Schumann and a 1911 SpecOp pistol offered with one, and of course 20mm barrels lined with stellite and using PGT. I am unsure about how much they increase accuracy, but they are easier on the bullet and barrel, causing ... WebDec 12, 2024 · A progressive twist 300NM would definitely be something to experiment with I think, probably considerably versus LH rifling (or do both too). Talking with a very …
US4308681A - Progressive ratchet rifling in a full gain twist - Google
http://forums.accuratereloading.com/eve/forums/a/tpc/f/9411043/m/205101327/xsl/print_topic WebAug 31, 2007 · I have a steyr in 308 which does shoot amazingly well for a una;tered factory rifle, and is very easy to clean. It does have a "twist" on the OUTSIDE of the barrel, but i suspect this is largely cosmetic (a la barrel flutes etc). I know of only a single production arm with a progressive or gain twist barrel, and that is S&W's 460 mag handgun. euphoniously meaning
Do all bores with rifling have the same twist rate along the ... - Quora
WebMar 16, 2024 · The need for a progressive twist rifling is not needed with our bullets. Because of the PDR on the Hammer Bullets they do not have the high pressure typically developed by non lead bullets. Usually they will run a little lower pressure than like weight cup and core lead bullets. In most rifles producing a little more vel than is typical for the ... WebJul 18, 2008 · The twist progresively tightens getting the bullet up to sufficient RPM for stablization. If you look down a gain twist barrel it looks normal, but then look down the … WebRifling in a gunbarrel accelerates in spiral from a relatively bore-parallel beginning and has a groove surface which in cross-section progressively rotates concurrently with the acceleration in... firmstrong beach cruiser reviews