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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 RUM problems
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<blockquote data-quote="D.Camilleri" data-source="post: 183045" data-attributes="member: 2567"><p>Yes, the barrel came as a straight blank at full dimension. At the time, this gunsmith was contouring all of his own. Now he has determined that it is much easier and cheaper to order the barrel with the propper contour. I watched him contour this barrel, he kept his carbide sharp and took very small cuts with plenty of cooling fluid. The barrel never got hot while he was turning it.</p><p></p><p>Now on to the news of today. I super cleaned the barrel last night and again this morning. Got a lot of copper out of it, got it all out. Loaded up some more shells and went to the range.</p><p></p><p>I pushed the OAL back to where I had been shooting before 3.600. Loaded some 250 gr partitions with moly behind 97 gr of Rel 25, some more behind 98 gr of Rel 25, some uncoated partitions in front of 96 gr of Rel 25 and some sierra game king 250's in front of 96 gr of Rel 25. I also shot my hunting load from the last 2 years of 98 gr of H-1000 in front of uncoated partition 250 gr.</p><p></p><p>97 gr rel 25, 250 partition moly: 4 shots 3.5" 2960fps</p><p>98 gr rel 25, 250 partition moly: 5 shots 1.25" with one flyer 3010fps</p><p>96 gr rel 25, 250 partition uncoated: 5 shots just under an inch 3050fps</p><p>96 gr rel 25, 250 sierra game king: 8" or more horrible</p><p>98 gr H-1000 250 partition uncoated: about 1.5" three shots under an inch with two flyers 2955fps</p><p>This is a little bit more encouraging, but this barrel still won't shoot a boat tail bullet at all and I have no idea why.</p><p></p><p>I have several loads here that I should be able to improve on, as soon as my shoulder heals up.</p><p></p><p>So why won't this barrel shoot boat tails? How much free bore is a 338 rum supposed to have? I know mine has a lot and seems to shoot better with the bullets having a long jump. At least now I know I can get at least a reasonable group. This barrel is still copper fouling badly. But it will be very clean for the rest of the testing.</p></blockquote><p></p>
[QUOTE="D.Camilleri, post: 183045, member: 2567"] Yes, the barrel came as a straight blank at full dimension. At the time, this gunsmith was contouring all of his own. Now he has determined that it is much easier and cheaper to order the barrel with the propper contour. I watched him contour this barrel, he kept his carbide sharp and took very small cuts with plenty of cooling fluid. The barrel never got hot while he was turning it. Now on to the news of today. I super cleaned the barrel last night and again this morning. Got a lot of copper out of it, got it all out. Loaded up some more shells and went to the range. I pushed the OAL back to where I had been shooting before 3.600. Loaded some 250 gr partitions with moly behind 97 gr of Rel 25, some more behind 98 gr of Rel 25, some uncoated partitions in front of 96 gr of Rel 25 and some sierra game king 250's in front of 96 gr of Rel 25. I also shot my hunting load from the last 2 years of 98 gr of H-1000 in front of uncoated partition 250 gr. 97 gr rel 25, 250 partition moly: 4 shots 3.5" 2960fps 98 gr rel 25, 250 partition moly: 5 shots 1.25" with one flyer 3010fps 96 gr rel 25, 250 partition uncoated: 5 shots just under an inch 3050fps 96 gr rel 25, 250 sierra game king: 8" or more horrible 98 gr H-1000 250 partition uncoated: about 1.5" three shots under an inch with two flyers 2955fps This is a little bit more encouraging, but this barrel still won't shoot a boat tail bullet at all and I have no idea why. I have several loads here that I should be able to improve on, as soon as my shoulder heals up. So why won't this barrel shoot boat tails? How much free bore is a 338 rum supposed to have? I know mine has a lot and seems to shoot better with the bullets having a long jump. At least now I know I can get at least a reasonable group. This barrel is still copper fouling badly. But it will be very clean for the rest of the testing. [/QUOTE]
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