Rock River LAR-8 and Gemtech Looming....need 308 tech advice.

[Rastus]

Rastus, Are you cutting the barrel down yourself?  If you are and don't mind putting the extra time into it it might be interesting to try cutting an inch back at a time and chrono it inch by inch to see how it drops.  You wouldn't need to recrown it every time, unless you wanted to shoot it for accuracy also, just take a hacksaw to it.
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Nope, I'm going to ask Curt Higgins of S and H Arms in Owasso to do it for me.  He's a real life machinest and Class III Manufacturer (He makes a integral Ruger M77 in 44 mag that's 1/2 the noise of a pellet gun).   If I can get quick turnaround and on the cheap it would be really great to cut it an inch at a time....maybe he's into the science I'll have to find out.