I had 2 rifles rebarreled in parallel. .270Wby Rebarreled by Kirby Allen(APS) and a .257Wby rebarreled by Chris Mathews (LSR).
.270Wby sports a SST Rock Creek Barrel 5R cut rifling, 1 in 10 twist heavy barrel with deep cut flutes, 26" long. Short Throat specd by Kirby.
Barreled action weighs 7 lbs. With stock and scope = 11lbs.
270Wby with 16X Super Sniper in temporary Bell & Carlson Stock (not bedded, just slapped into stock)
All targets shot at 100yards.
This was all the load developing I've done so far. My final load for the .270 is IMR7828-69.5gr, 140 Accubond.
This rifle is a real pleasure to shoot and I am very happy with it. Kirby did an awesome job and I have to give credit to Mike Rock. He did a great job with the deep cut fluting. The barrel is 1.120 at the threads straight for 6 inches and then a straight taper that ends at .75" dia at the muzzle.
.257Wby Rebarreled by Chris Mathews is next.
The .257Wby has a lighter SST barrel, It's a Broughton 5R button pulled barrel, 26" long and was fluted by Chris.
The final load I've selected for the .257Wby is IMR7828-70.5gr, 115 Nosler Balistic Tip.
I was just starting to narrow down my load development when the .257 started giving my trouble. Just last week while at the range, the firing pin released when I closed the bolt. I did not pull the trigger. The primer was not hit, but the cocking piece slipped off the sear and wedged on top of it. I could not even open the bolt until the trigger was pulled, releasing the sear and unwedging the cocking piece. I tried to close the bolt (with the chamber empty) several times and and the firing pin released about 50% of the time. I want to point out that Chris did not work on the trigger and this is something that developed about 4 months after getting the rifle back. I suspect that the tolerance stack up in all the parts are at minimum material condition and whatever wear has occured with normal wear of cycling the bolt has allowed the cocking piece to slip off the sear.
I just mailed the rifle to a Wby service center for repair. I'll see what they say in about 3 weeks.
Well that's the end of my report.