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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
6-284 long range antelope load
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<blockquote data-quote="Fiftydriver" data-source="post: 34954" data-attributes="member: 10"><p>T.O.M.,</p><p></p><p>I would not totally disagree with your comments but I do feel that a properly fitted and chambered 6mm-284 will produce at least 150 fps more velocity the the 243 AI of equal barrel length and chamber quality.</p><p></p><p>The problem us that most loaders use the wrong powder for the 6mm-284 and as a result will not get full velocity potential. </p><p></p><p>THe large cased small bore rounds are a tricky bunch to get working to full velocity.</p><p></p><p>I recently built a 6mm-06 for a customer and when doing the barrel break in he also did some liad developement.</p><p></p><p>This rifle wore a 28.5" Kreiger barrel with a 1-9 twist. He was getting 4400 fps with the 55 gr Ballsitic Tips and getting groups in the 1's and 2's at that velocity.</p><p></p><p>The rifle was designed for the 105 gr A-Max and once the barrel was broke in be tested that round and was getting +3600 fps with groups in the 3's out of the 28.5" barrel.</p><p></p><p>I am getting 3550 fps out of my 6mm-284 with the 107 gr Mk with its 1-8 twist 30" Lilja barrel, using coated bullets.</p><p></p><p>I have never seen any 243 AI or 6mm AI get anything over 3400 and 3500 fps respectively out of a 28 to 30" barrel.</p><p></p><p>That is not to say it is not possible to get a very fast 243 AI and a slow barreled 6mm-284.</p><p></p><p>What velocities are your friend getting with both rounds? I would be curious if he is driving the 6mm-284 where he should be with the correct powders.</p><p></p><p>Like I said, the big cased small bores have a much narrower powder selection that will produce top velocities, especially compered to the 243 AI.</p><p></p><p>Another problem is if he is using Lapua 6.5-284 brass to form cases out of. This brass is very top quality but also very soft and he WILL burn it up in very few firings even with near top level loads.</p><p></p><p>THe Norma brass is the same way. Most Wby cases will gie up the ghost on the 2nd or 3rd firing with full tilt loads simply because teh brass is so soft.</p><p></p><p>I use Win brass only in my 6mm-284's. It is not as quality from the box as the European brass, but after an hour at the bench sorting and machining the win brass, it will make the foreign stuff look pretty bad.</p><p></p><p>It is also much harder brass and will survive much higher pressure loads for much longer. IT also machines much cleaner then the stickier, softer foreign brass and also cost half as much.</p><p></p><p>Hornady brass is alright but the Win brass is the stoutest I have used in the 284 class wildcats and all I will recommend for the reasons you list.</p><p></p><p>Good Shooting!!</p><p></p><p>Kirby Allen(50)</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 34954, member: 10"] T.O.M., I would not totally disagree with your comments but I do feel that a properly fitted and chambered 6mm-284 will produce at least 150 fps more velocity the the 243 AI of equal barrel length and chamber quality. The problem us that most loaders use the wrong powder for the 6mm-284 and as a result will not get full velocity potential. THe large cased small bore rounds are a tricky bunch to get working to full velocity. I recently built a 6mm-06 for a customer and when doing the barrel break in he also did some liad developement. This rifle wore a 28.5" Kreiger barrel with a 1-9 twist. He was getting 4400 fps with the 55 gr Ballsitic Tips and getting groups in the 1's and 2's at that velocity. The rifle was designed for the 105 gr A-Max and once the barrel was broke in be tested that round and was getting +3600 fps with groups in the 3's out of the 28.5" barrel. I am getting 3550 fps out of my 6mm-284 with the 107 gr Mk with its 1-8 twist 30" Lilja barrel, using coated bullets. I have never seen any 243 AI or 6mm AI get anything over 3400 and 3500 fps respectively out of a 28 to 30" barrel. That is not to say it is not possible to get a very fast 243 AI and a slow barreled 6mm-284. What velocities are your friend getting with both rounds? I would be curious if he is driving the 6mm-284 where he should be with the correct powders. Like I said, the big cased small bores have a much narrower powder selection that will produce top velocities, especially compered to the 243 AI. Another problem is if he is using Lapua 6.5-284 brass to form cases out of. This brass is very top quality but also very soft and he WILL burn it up in very few firings even with near top level loads. THe Norma brass is the same way. Most Wby cases will gie up the ghost on the 2nd or 3rd firing with full tilt loads simply because teh brass is so soft. I use Win brass only in my 6mm-284's. It is not as quality from the box as the European brass, but after an hour at the bench sorting and machining the win brass, it will make the foreign stuff look pretty bad. It is also much harder brass and will survive much higher pressure loads for much longer. IT also machines much cleaner then the stickier, softer foreign brass and also cost half as much. Hornady brass is alright but the Win brass is the stoutest I have used in the 284 class wildcats and all I will recommend for the reasons you list. Good Shooting!! Kirby Allen(50) [/QUOTE]
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