thank you gentlemen for the reply. i have heard of pulling bullets from steel cased russian ammo and seating the same gr. match bullet in its place. any comment on this practice?
My honest opinion....Dont shoot steel cased ammo in a 14...
Most 14's (M1A's) today are not a 7.62 milspec chamber (slightly larger), they are a standard 308 Winny chamber. Brass stretches and grips the chamber walls (for a couple milliseconds) then contracts. Its
needs to contract for efficient extraction of the case. Steel behaves differently, it may not contract as much (or at all) and with a tighter chamber (non-milspec) you will likely (read, you "will") encounter problems such as stuck cases and/or case-head separations. Not fun... My advice is to save yourself the aggravation and dont shoot it in your M14/M1A.
The cycling action of the M14 is about one of the fastest of the gas guns that you can own. With a non-milspec chamber you need cases that are going to "behave" appropriately, which means using brass..