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Posted: 12/3/2005 2:24:00 AM EDT
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A few years ago I bought 40 rounds of Winchester .223 from one FFL. And a few days later 60 more rounds of .223 from a different FFL. All 100 rounds were 55 grain FMJBT. They were from different lots and slightly different boxes. But all five boxes said Winchester. Sorry, I don’t know what code it said on the boxes. I didn’t have an AR at the time, but I did have (and still do) a Very good shooting Remington bolt action. They all shot very well, but 40 rounds ejected perfectly, the other 60 rounds didn’t always eject correctly. That can be very annoying. Take five rounds out of the MTM ammo box and load the rifle. Shoot minute groups – sub minute on a good day – and cleanly eject a spent cartridge. The next two shots would always be as accurate, but almost two out of three times I would have a Failure to Eject. And shot five or so would eject perfectly. Since then I have always bought ammo by the case. Unless I was trying out some new brand of ammo to see what it’s like. I might buy one to five boxes then. But that has bothered me for several years now: Why would some cartridges from the same company give me difficulty ejecting when others would not? |
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One could have been from a bad heat of brass that was weaker and had more case-head expansion. Or it could have been loaded a little faster or slower. Or the sizing die on one machine could be slightly oversize, enough to make a difference in YOUR rifle. All kinds of things are possible. I saved money up for a while and bought over 10,000 rounds of ammo from the same lot, instead of buying a half-case at a time. There was a reason for this: I tested this ammo out in my rifles, and it works great in all of them, and now I have a lot of ammo I can trust that will all shoot to the same zero. You have the right idea. -Troy |
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