A best friend has a 30", 12 Twist Hart.
Accuracy load with Sierra 100g Match Kings is 4000 fps, using around 71-72g of R#22 in PMC brass with Federal 215s and this is a rock chuck rifle.
85-87g is right at 4200, Nosler BT and Speer Hot Core.
I sold him the New Hart Barrel blank, and I had the Reamer ground with zero freebore. I also had the neck shortened .050 which is perfect for necking down the Winchester brand of .264 Win Mag and 7 Mag brass that forms a perfect double radus on every case with NONE lost.
I did the calculations that the Barnes TTSX 80g would stabilize in the 12 twists, and 4200 would not suck.
I had 4-6 barrels cut with this zero freebore reamer, and we hunted with them in 10 twists and X caliber 9 Tiwst.
The 25" barrels and 26" barrels are shooting the 100g at 3850 into a bug hole, 71-72g of R#22. 110g Nosler accubonds and the 115g Bergers are doing 3620 on a 26" and 3590 on a 25" barrel with 67-69g of R#22.
We have put together a total of 6 guns with the zero freebore configuration since 1990, everyone, no matter if the barrel was a Pac Nor, Lilja, Hart, Krieger, and lately, the X caliber brand of the barrel has shot tiny groups. Load development is just dumb butt simple and quick with a few rounds fired(35 or less) with R#22 for 100s, 110g, and 115g and R#19 for the light bullets with Fed 215s in all use.
I let a gunsmith borrow the reamer, and he ruined it. So, I ordered another reamer with .020 freebore.
On the 25" X caliber barrels on 700 actions with Boyd stocks, we added a Gentry muzzle break for a nephew who is recoil sensitive. He shot three bucks last year plus a few does, he just grins now. He says he sees the water vapor fly off of the deer and watch the deer fold up on every shot.
I am going to call Hammer bullets for use in my Krieger 30" 12T barrel blank and see if anything they have will stabilize and speeds should be 4200+
Accuracy load with Sierra 100g Match Kings is 4000 fps, using around 71-72g of R#22 in PMC brass with Federal 215s and this is a rock chuck rifle.
85-87g is right at 4200, Nosler BT and Speer Hot Core.
I sold him the New Hart Barrel blank, and I had the Reamer ground with zero freebore. I also had the neck shortened .050 which is perfect for necking down the Winchester brand of .264 Win Mag and 7 Mag brass that forms a perfect double radus on every case with NONE lost.
I did the calculations that the Barnes TTSX 80g would stabilize in the 12 twists, and 4200 would not suck.
I had 4-6 barrels cut with this zero freebore reamer, and we hunted with them in 10 twists and X caliber 9 Tiwst.
The 25" barrels and 26" barrels are shooting the 100g at 3850 into a bug hole, 71-72g of R#22. 110g Nosler accubonds and the 115g Bergers are doing 3620 on a 26" and 3590 on a 25" barrel with 67-69g of R#22.
We have put together a total of 6 guns with the zero freebore configuration since 1990, everyone, no matter if the barrel was a Pac Nor, Lilja, Hart, Krieger, and lately, the X caliber brand of the barrel has shot tiny groups. Load development is just dumb butt simple and quick with a few rounds fired(35 or less) with R#22 for 100s, 110g, and 115g and R#19 for the light bullets with Fed 215s in all use.
I let a gunsmith borrow the reamer, and he ruined it. So, I ordered another reamer with .020 freebore.
On the 25" X caliber barrels on 700 actions with Boyd stocks, we added a Gentry muzzle break for a nephew who is recoil sensitive. He shot three bucks last year plus a few does, he just grins now. He says he sees the water vapor fly off of the deer and watch the deer fold up on every shot.
I am going to call Hammer bullets for use in my Krieger 30" 12T barrel blank and see if anything they have will stabilize and speeds should be 4200+
