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Posted: 9/5/2009 6:40:48 AM EDT
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Now with both 1/9 and 1/7 car beans, what ammo would you suggest.
I've got maybe 600 rnds left of American Eagle XM193 for the 1/9 that I want to top off again at 2000 but what is an accurate bulk rnd. to feed the 1/7, preferably brass cased? And how much do you lay in before you can breath easy, 2000 of each? |
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Quoted:
I was told by an instructor with a federal agency that the 62 grain military ammo is the most reliable. Apparently he runs tens of thousands of rounds in his classes every year. For most training under 100 yards wolf seems fine. Posted Via AR15.Com Mobile reliable for what? feeding, ignition, extraction accuracy, etc???? |
| Keep as many 55 gr rounds as you can for the 1/9 twist (I wouldn't be comfortable with anything less than 2,000 (and thats the bare bones minimum, IMO). I would then find a round that the 1/7 twist likes in the high 60's or low to mid 70's. I'm sure the 1/7 will shoot the 55 gr just fine, but I would get some heavier rounds for longer range accuracy (thats just me). |
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Quoted:
Keep as many 55 gr rounds as you can for the 1/9 twist (I wouldn't be comfortable with anything less than 2,000 (and thats the bare bones minimum, IMO). I would then find a round that the 1/7 twist likes in the high 60's or low to mid 70's. I'm sure the 1/7 will shoot the 55 gr just fine, but I would get some heavier rounds for longer range accuracy (thats just me). Thanks |
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Simplify things. Don't worry about keeping 2 different rounds.
IMHO you should buy a small assortment of NATO cartridges such as XM193 or M855. determine which round you want to shoot and then buy as much of that as you can afford. My experience has shown me that M855 will shoot fine out of both barrel twists. Be sure to buy NATO produced ammo though because the production standards are geared for long term storage so you won't have to worry so much about temperature and time limits. |
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Quoted:
Simplify things. Don't worry about keeping 2 different rounds. IMHO you should buy a small assortment of NATO cartridges such as XM193 or M855. determine which round you want to shoot and then buy as much of that as you can afford. My experience has shown me that M855 will shoot fine out of both barrel twists. Be sure to buy NATO produced ammo though because the production standards are geared for long term storage so you won't have to worry so much about temperature and time limits. This |
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Quoted:
Simplify things. Don't worry about keeping 2 different rounds. IMHO you should buy a small assortment of NATO cartridges such as XM193 or M855. determine which round you want to shoot and then buy as much of that as you can afford. My experience has shown me that M855 will shoot fine out of both barrel twists. Be sure to buy NATO produced ammo though because the production standards are geared for long term storage so you won't have to worry so much about temperature and time limits. I plan on shortening the 1/9 to an 11 possibly 12.5. With M855, you don't see any problems with yaw/frag. especially on 'thin, malnourished' targets? |
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your good with SBR. Your velocity will change but you will still get good terminal balistics out of the round as long as you don't push your distance. I'm having trouble recalling information but my understanding is you will loose around 55 FPS with every inch of barrel cut off. The 855 has roughly a 3100 FPS velocity so if you cut down to 12.5 you will loose approximately 192.5 FPS.
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