For a semi-auto precision rifle (they do exist), I'd build an AR-10 clone with a 6.5x47 Lapua barrel.
The 6.5x47 Lapua case is the same diameter and overall loaded length as the 7.62x51 (.308) that the AR-10 is designed for, so the build would be easy.
Just change the barrel to a Krieger AR-10 1:10 6.5x47 Lapua barrel.
Mega Machining matched lower & monolithic upper,
Geissele Automatics semi-auto match trigger,
Lewis Machine & Tool bolt & bolt carrier, and parts,
Krieger barrel (stainless 1:10 twist, heavy AMU AR profile),
Magpul stock,
Tango Down grip,
Surefire suppressor.
Out to 1200 yards, the above semi auto rifle will send bullets with nearly the same accuracy and flight path as a bolt action rifle.
Less energy on impact from the little 6.5mm diameter 140gr bullet - but it flies about the same as the larger diameter 7.62mm 230gr, or the much larger .338 diameter 300 grain.
If the targets are deer-sized or smaller, they'll pretty much all be equally dead.
The 6.5x47 Lapua case is the same diameter and overall loaded length as the 7.62x51 (.308) that the AR-10 is designed for, so the build would be easy.
Just change the barrel to a Krieger AR-10 1:10 6.5x47 Lapua barrel.
Mega Machining matched lower & monolithic upper,
Geissele Automatics semi-auto match trigger,
Lewis Machine & Tool bolt & bolt carrier, and parts,
Krieger barrel (stainless 1:10 twist, heavy AMU AR profile),
Magpul stock,
Tango Down grip,
Surefire suppressor.
Out to 1200 yards, the above semi auto rifle will send bullets with nearly the same accuracy and flight path as a bolt action rifle.
Less energy on impact from the little 6.5mm diameter 140gr bullet - but it flies about the same as the larger diameter 7.62mm 230gr, or the much larger .338 diameter 300 grain.
If the targets are deer-sized or smaller, they'll pretty much all be equally dead.
