Someone explain please this barrel to me,am I lucky or headed for diseaster some day?
A little over a year ago I purchased a rem700 police model in 300rum.The velocities coincided with the loading data pretty close.The problem was I could only get 3/4 in-groups after trying almost everything.[bullet.powder combo]I decided to rebarrel it with a Shilen SS and true it up.30in blank faced at each end with a muzzel brake.I broke it in properly using some old 180 pro hunter sierra's at min. load.I noticed that the bolt was hard to open sometimes but I figured it was just a close headspace.Since then I broke out the chrony and the velocities vs powder charge are unreal to me.By the way,this is only my second match barrel so Im kinda green.Heres a few results.
200gr SMK-86.0 gr H-1000/3115 ave.The max load is 93.5 at 3050.
200gr SMK-95gr H-870/3290 TO 3315.Slight signs of pressure on primers.
165gr Swift scirocco/84gr H-4831sc/3640 ave.Bolt a little hard to open.
A couple of grains above any of these and I have to tap the bolt open and knock out the brass since I dont want to break the rem extractor.I have checked other rifles with this chrony and velocities were in the norm.Could the muzzle brake
effect the chrony or is this barrel a fluke?Chrony 8ft away.Just thought I'd ask you guys since I cant sleep at night.By the way,with the H-1000 load 200SMK I shot a 8.25 5 shot group at 1000 on a no-wind day.Thats good for me.Any explanations or advice would be greatly appreciated.Im kinda new to this.