So I got the brake installed last night and got some brass turned out and loaded for a test run today. Range conditions SUCKED with 15+ MPH winds with gusts but this was happening!!!
The specs are Savage 12 with a Lawton 1-10 twist 29in long including 3 port Muscle Brake, shouldered. Chambered in a 270 WSM set up for the highest BC bullets with .310 neck which gets me .003 clearance after turning the necks.
Loaded up some 150gr Ballistic tips and a couple of 165 Matrix to get an idea on them, the 150's were .010 of the lands and the Matrix just into the lands.
Loaded up 66gr of Retumbo in all but 5 which I stepped from 67 to 71 gr, the 150's ran 3150's and the Matrix at 3056 fps easy. I wanted to find max is why I loaded up the set of five, 67gr = 3187, 68gr = 3212, 69gr = 3266, 70gr = 3295, 71gr = 3351. Got a little bolt lift on 70gr and stiff on 71gr also showed .001 growth at the pressure ring with none below 70gr that so I think I have a good idea where to work at. Ran a few through the Redding bushing die and loaded and run out is under .001.
I'm feeling good about how everything turned out for my first chambering job and spec out reamer with worked over brass. I'll get better pics of the rifle in the day light but got some group pics. I think it shows some promise, specially with no load tuning at all and shooting of the bipod in a howling wind!.
First break in group, top two are the first two, I think I have two groups because the target was swinging bad so I had to try to time them. Didn't try to zero and cleaned between shots.
Made a couple scope adjustments and could see the shots which tend to make me shoot bad, when I get them out to 300yrd + then I'll settle down so we'll see.
Shot of the loaded case and bullet placement of a 165 Matrix