Mystic Precision
CGN Ultra frequent flyer
- Location
- Summerland, BC
Mystic, what is your theory for why we're getting the velocities we're getting from a 21.75" Rock Creek barrel while getting consistent groups? The barrel is a 1:10 twist and we've gun juiced the barrels but from your point of view how is 2800ish fps possible?
Simple....you just added more powder!
SAAMI specs put the 175gr velocity under 2700fps as does US milspec. Going higher, you are simply running more pressure - like the BR shooters.
With a tighter smooth bore and strong lock up, you are seeing some tangible improvements. Just be careful that you are not so close to the edge that a few psi spike locks things up.
Running standard cartridges at magnum or higher pressures has been done for decades.
Jerry