i'm in the planning phase for a lightweight big bore for my work and i have two quesitons for those who are savvy one low mass BCG's.
1. chambering heavy-grain bullets. i was reading an old post where a buy with a .358 win. AR said that his lightweight carrier wouldn't reliably chamber bullets over 220 gr (memory.. can't find the post now..) makes sense; the lighter reciprocating mass of the carrier is mostf easily stopped or slowed by a heavier shell and fails to fully close. has anyone else experienced this. what bullet weight was the max? (ar-15 or 308 sized) could this be overcome by a heavier spring and more gas?
2. (.. and considder this seperately from the issues in q#1) we all know that when using a lighter carrier we need an adjustable gas block to tune/reduce the gas.. so would i be able to run a pistol length barrel with a mid length gas system? (or similar) and be closer to the gas requirements for cycling the lighter carrier? i ask because i see very little selection for big bore pistol barrels for the ar-15 andeven less for the 308 sized action.. but with plentiful carbine pencil barrels, and owning two lathes, i could easily cut down a 16 or 18" barrel to 12" and rethread/crown.. and i could choose between the carbine, rifle, or mid length gas port. (portss @ 7", 12", and 9" repectively)
anyone played with this?
thanks in advance.
1. chambering heavy-grain bullets. i was reading an old post where a buy with a .358 win. AR said that his lightweight carrier wouldn't reliably chamber bullets over 220 gr (memory.. can't find the post now..) makes sense; the lighter reciprocating mass of the carrier is mostf easily stopped or slowed by a heavier shell and fails to fully close. has anyone else experienced this. what bullet weight was the max? (ar-15 or 308 sized) could this be overcome by a heavier spring and more gas?
2. (.. and considder this seperately from the issues in q#1) we all know that when using a lighter carrier we need an adjustable gas block to tune/reduce the gas.. so would i be able to run a pistol length barrel with a mid length gas system? (or similar) and be closer to the gas requirements for cycling the lighter carrier? i ask because i see very little selection for big bore pistol barrels for the ar-15 andeven less for the 308 sized action.. but with plentiful carbine pencil barrels, and owning two lathes, i could easily cut down a 16 or 18" barrel to 12" and rethread/crown.. and i could choose between the carbine, rifle, or mid length gas port. (portss @ 7", 12", and 9" repectively)
anyone played with this?
thanks in advance.