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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrels for Barrel burning Cartridges
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<blockquote data-quote="Prieto9000" data-source="post: 1215894" data-attributes="member: 24952"><p>I´ve been playing around with qpq treated barrels for since last year and 2 out of 3 have performed perfectly in the accuracy side. The 3rd one was not as accurate but it still gives me a lot of extra MV. </p><p></p><p>Here´s what I´ve seen:</p><p></p><p>1st Rifle:</p><p>7mm rem Mag built on a 700 blue printed action with a 26" Bartlein 1:9 Barrel.</p><p>When all the machining of the rifle was finished I disassembled it and sent it to the qpq bath. Then reassembled it and headspace changed by .004", changed the Recoil lug for a .002" thicker one and problem solved.</p><p>On the performance side it was awesome Super Accurate, around .25MOA and it was around 150fps faster than another rifle built the same, just non qpq treated. Load was exactly the same. Same brass, same powder, same charge, same primer and same bullet.</p><p></p><p>2nd Rifle:</p><p>.338 Lapua Mag built on a 700 Action and a 26" Bartlein 1:9.3" Barrel</p><p>After all the machining was finished the rifle was disassembled and sent to the qpq bath hoping to get different results than previous time. On this occasion, the barrel fitted perfectly, the headspace was spot-on, bbbuuuuuutttttttt... the brake got misaligned just a little bit, it was very hard to notice, but it was there.</p><p>On the performance side, it also worked like a charm it was super accurate, sub ½ MOA consistently from the beginning, and MV was awesome it gave 2860 fps using 92gr of H1000. Considering I get 2872fps out of my .338 EDGE using a 30" barrel and 95gr of retumbo, I believe it´s pretty impressive. </p><p></p><p>3rd Rifle:</p><p>6.5 Creedmoor on a Tikka T3 Action and 18.5" Benchmark 1:8"</p><p>Trying to avoid previous faults seen on the past 2 rifles we decided to do something different. This time we did all the machining on the rifle and the Action, Torqued everything that needed to be torqued and sent the barreled action to the bath. It looks perfect, everything is perfectly aligned bbbuuuutttttttt... And here´s the bad one, I´m only getting 0.5 to 0.75 MOA out of this rifle. It´s fine, it works, it gets the bullets on target most of the time, but I´m used to more accuracy than this, all my rifles shoot far better than this. On the bright side, i´m getting 2739fps with the 143gr ELD-X and 2972fps with the 123 SST. It´s still a decent 800-900yd deer rifle.</p><p>I can't speak about barrel wear yet, They haven´t been shot a lot, but it does increase MV by about 150fps at least.</p></blockquote><p></p>
[QUOTE="Prieto9000, post: 1215894, member: 24952"] I´ve been playing around with qpq treated barrels for since last year and 2 out of 3 have performed perfectly in the accuracy side. The 3rd one was not as accurate but it still gives me a lot of extra MV. Here´s what I´ve seen: 1st Rifle: 7mm rem Mag built on a 700 blue printed action with a 26" Bartlein 1:9 Barrel. When all the machining of the rifle was finished I disassembled it and sent it to the qpq bath. Then reassembled it and headspace changed by .004", changed the Recoil lug for a .002" thicker one and problem solved. On the performance side it was awesome Super Accurate, around .25MOA and it was around 150fps faster than another rifle built the same, just non qpq treated. Load was exactly the same. Same brass, same powder, same charge, same primer and same bullet. 2nd Rifle: .338 Lapua Mag built on a 700 Action and a 26" Bartlein 1:9.3" Barrel After all the machining was finished the rifle was disassembled and sent to the qpq bath hoping to get different results than previous time. On this occasion, the barrel fitted perfectly, the headspace was spot-on, bbbuuuuuutttttttt... the brake got misaligned just a little bit, it was very hard to notice, but it was there. On the performance side, it also worked like a charm it was super accurate, sub ½ MOA consistently from the beginning, and MV was awesome it gave 2860 fps using 92gr of H1000. Considering I get 2872fps out of my .338 EDGE using a 30" barrel and 95gr of retumbo, I believe it´s pretty impressive. 3rd Rifle: 6.5 Creedmoor on a Tikka T3 Action and 18.5" Benchmark 1:8" Trying to avoid previous faults seen on the past 2 rifles we decided to do something different. This time we did all the machining on the rifle and the Action, Torqued everything that needed to be torqued and sent the barreled action to the bath. It looks perfect, everything is perfectly aligned bbbuuuutttttttt... And here´s the bad one, I´m only getting 0.5 to 0.75 MOA out of this rifle. It´s fine, it works, it gets the bullets on target most of the time, but I´m used to more accuracy than this, all my rifles shoot far better than this. On the bright side, i´m getting 2739fps with the 143gr ELD-X and 2972fps with the 123 SST. It´s still a decent 800-900yd deer rifle. I can't speak about barrel wear yet, They haven´t been shot a lot, but it does increase MV by about 150fps at least. [/QUOTE]
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