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Posted: 4/7/2009 2:03:11 PM EDT
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Thinking of building one of these, and need any info I can get on this round.
I'm not even sure what this round is called (may have several names), but it is 6mm brass necked down to .22. I'm told a long action works much better for this round, and that it's super fast and won't burn the barrel with moderate use. |
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I just googled ".22-6mm" and these were some of the first to come up...
http://longrangehunting.com/forums/f17/22-250-ai-22-6mm-243-a-1628/ http://www.thefirearmsforum.com/showthread.php?t=42639 http://www.firearmstalk.com/forums/f30/info-22-6mm-3271/ http://forums.gunbroker.com/topic.asp?TOPIC_ID=278503 I hope those help. seems like a cool little round. |
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The most common version of this combination today is the .22 Texas Trophy Hunter (TTH). In fact a "long" (.30-06 length) action is required for a 6mm Rem-based cartridge; .308 length isn't enough.
[ETA: Post below is true that the 722 was offered in 6mm (".244 remington"), and the 722 was ONLY in short action. I will say that of the TTHs I have seen, all were on standard length actions, probably to allow shallow seating of long bullets. Somebody smarter than I am (shouldn't be hard to find) needs to chime in to help the OP out on that question.] You'll hear this sort of thing from a lot of self-inflating blowhards like me, but this sort of cartridge is truly not for the beginner. –– Wildly overbore, hyper-performance rounds like this tend to be finicky, and you will need to push right at the ragged edge to get the additional few percent of velocity that it gives you over the highest level factory product. –– It is also pretty much a single-purpose creature. You will undoubtedly want a fast twist to stabilize the pencil-like projectiles that extract the most downrange potential. Therefore, excepting all-copper bullets that will hold together, anything 55 grains or under could come unglued or at best be overspun, resulting in disappointing accuracy. –– If you had a "little" rifle in mind, go back to a .22-250. This round needs a LONG barrel (26" minimum, 28-30" preferred) to burn all that powder in the tiny bore diameter. And whenever you have a long barrel, minute fabrication variances (e.g., residual stresses) and bedding errors will reveal themselves mercilessly. –– Speaking of barrels, there's no way you can burn this much powder in a .22 without eating away at the throat MUCH faster than with a typical .22 varmint cartridge. And break-in with this round is critical: get it wrong and your piece might never shoot the way you had hoped. So, what do I think? I'm jealous!! I once had the short action version (.22 Middlestead, which necks down the .243 and can use a short action), and it was a hoot. I longed to get a .22/6mm, but I chickened out. A gentleman I knew could break clays monotonously at 600 yds with 80 gr. Sierra and Berger VLDs on a calm day with his TTH. (Mind you, he paused at least 3 minutes between shots, and religiously cleaned the barrel every five rounds.) He was confident enough in precision shot placement to use these target bullets for antelope and deer. In his skilled hands it was awesome. It is not a caliber to learn about reloading and precision shooting, which I'm guessing you are based on the way you asked the question (please don't misinterpret –– NO insult implied or intended). But if you have some patience and are willing to deal with some disappointment along the way, you will be operating in rarified air. Good luck, sir!!! |
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