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Long Range Hunting & Shooting
6mm-284vs 6mmAI
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<blockquote data-quote="Picketpin" data-source="post: 920721" data-attributes="member: 77546"><p>The 6mm AI is essentially perfectly bore balanced. You will get the best over all accuracy and load densities with it. The increase in case capacity is minuscule and really doesn't gain you much. EXCEPT like the 22-250 AI the straight walled case and the sharp shoulder prevent a lot of case stretching and your brass last a lot longer. THAT said how many times are you actually going to shoot it at deer. If you buy a 100 cases they will last a life time of big game hunting.</p><p></p><p>The only reason I would make the 6mm AI is if I were going to use it as a varmint rife and shoot it a lot. Then brass life becomes an issue.</p><p></p><p>The 6-284 is essentially the same case capacity as a 6mm-06, the data is interchangeable. If the 6mm Remington is nearly perfectly bore balanced and the 6mm AI IS bore balanced . Then the 6mm-284 has to be overbore by definition. Basically your talking the 7x57 case versus the 30-06 case. The 6-284 is a pretty modern case style, straight walled and sharp shouldered with a rebated rim. Not much to improve in terms of case design.</p><p></p><p>The AI is a more versatile case for most applications. You can shoot the light bullets at varmints and the 95-105s at deer/antelope. </p><p></p><p>There is an UP side to the 6-284. You can drive heavy for caliber bullets significantly faster than you can with the AI. That does come at a cost of more recoil, noise, and cost but as a hunting rifle just how many rounds are you going to actually shoot?</p><p></p><p>The DOWN side is while you can shoot varmint weight bullets 70s etc because the 6-284 is overbore it requires MORE powder to generate the same pressures and velocities as the 6mm Rem or the 6mm AI.</p><p></p><p>I own at least 5 rifles in 6mm Rem. I have nevr built a 6mm AI because I just don't see it worth the cost. Of course mine are used as dual purpose rifles to shoot rockchucks and deer/antelope. I have several 22-250AIs, because I DO use them for varmints and brass life is a real issue when firing thousands of rounds a year. I own several 257Roberts AIs because they ive me damned near 25-06 velocities with 110-120s with less powder and recoil. Again if the 257 Roberts or AI on the 7x57 case is bore balanced aand it is, then the 25-06 is over bore and does best with heavy for caliber bullets.</p><p></p><p>Now to the 6-284. I bought my first one in 1972. Somebody had wildcatted a Flat Bolt Ruger 77 and the store sold it to me priced right with brass and dies. It is/was my favorite antelope cartridge for years and along the way I have built 3 more on the Ruger #1 to get advantage of the longer barrels. These are HUNTING rifles designed to shoot deer/antelope and the occassional long range coyote with HEAVY bullets. I finally built a fast twist 1:8 twist Shilen barreled #1 to shoot really heavy.long VLDs at rockchucks sitting a LONG ways of.</p><p></p><p>Either can be made by simply rechambering an existing 243 or 6mm unless you want to shoot VLDs then you'll need a new, faster twist barrel. The advent/popularity of the 6.5-284 and great Lapua brass doesn't hurt. </p><p></p><p>I'd just decide exactly what you are going to do with the rifle and what YOU are doing it for.</p><p></p><p>Closest to a 6mm AI I have is a custom #1 in 22-6mm AI with a 1:7 twist barrel to shoot heavy VLDs in .224 caliber.</p><p></p><p>Ross</p></blockquote><p></p>
[QUOTE="Picketpin, post: 920721, member: 77546"] The 6mm AI is essentially perfectly bore balanced. You will get the best over all accuracy and load densities with it. The increase in case capacity is minuscule and really doesn't gain you much. EXCEPT like the 22-250 AI the straight walled case and the sharp shoulder prevent a lot of case stretching and your brass last a lot longer. THAT said how many times are you actually going to shoot it at deer. If you buy a 100 cases they will last a life time of big game hunting. The only reason I would make the 6mm AI is if I were going to use it as a varmint rife and shoot it a lot. Then brass life becomes an issue. The 6-284 is essentially the same case capacity as a 6mm-06, the data is interchangeable. If the 6mm Remington is nearly perfectly bore balanced and the 6mm AI IS bore balanced . Then the 6mm-284 has to be overbore by definition. Basically your talking the 7x57 case versus the 30-06 case. The 6-284 is a pretty modern case style, straight walled and sharp shouldered with a rebated rim. Not much to improve in terms of case design. The AI is a more versatile case for most applications. You can shoot the light bullets at varmints and the 95-105s at deer/antelope. There is an UP side to the 6-284. You can drive heavy for caliber bullets significantly faster than you can with the AI. That does come at a cost of more recoil, noise, and cost but as a hunting rifle just how many rounds are you going to actually shoot? The DOWN side is while you can shoot varmint weight bullets 70s etc because the 6-284 is overbore it requires MORE powder to generate the same pressures and velocities as the 6mm Rem or the 6mm AI. I own at least 5 rifles in 6mm Rem. I have nevr built a 6mm AI because I just don't see it worth the cost. Of course mine are used as dual purpose rifles to shoot rockchucks and deer/antelope. I have several 22-250AIs, because I DO use them for varmints and brass life is a real issue when firing thousands of rounds a year. I own several 257Roberts AIs because they ive me damned near 25-06 velocities with 110-120s with less powder and recoil. Again if the 257 Roberts or AI on the 7x57 case is bore balanced aand it is, then the 25-06 is over bore and does best with heavy for caliber bullets. Now to the 6-284. I bought my first one in 1972. Somebody had wildcatted a Flat Bolt Ruger 77 and the store sold it to me priced right with brass and dies. It is/was my favorite antelope cartridge for years and along the way I have built 3 more on the Ruger #1 to get advantage of the longer barrels. These are HUNTING rifles designed to shoot deer/antelope and the occassional long range coyote with HEAVY bullets. I finally built a fast twist 1:8 twist Shilen barreled #1 to shoot really heavy.long VLDs at rockchucks sitting a LONG ways of. Either can be made by simply rechambering an existing 243 or 6mm unless you want to shoot VLDs then you'll need a new, faster twist barrel. The advent/popularity of the 6.5-284 and great Lapua brass doesn't hurt. I'd just decide exactly what you are going to do with the rifle and what YOU are doing it for. Closest to a 6mm AI I have is a custom #1 in 22-6mm AI with a 1:7 twist barrel to shoot heavy VLDs in .224 caliber. Ross [/QUOTE]
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