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Posted: 7/17/2007 1:21:17 PM EDT
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I usually shoot Black Hills 55 grain FMJ rounds in 20 round CProducts aluminum magazines with Mar-Lube and have never had a failure in 2000+ rounds. This past weekend I bought a box of Black Hills 68 grain Heavy Match rounds and encountered several failures to feed on every magazine I loaded. I compared the 55 grain FMJ to the 68 grain Heavy Match which appeared to the eye to be longer. Is there a maximum overall cartridge length that can be used in magazines? I did a search and could not find anything on this topic so forgive me if it has already been explained. Thank you in advance. |
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Simple answer is yes, but...Theres always a but.... There is a Max Case Overall Length for any given bullet and case combination and it can vary by bullet type and weight. That being said some of the heaver rounds, match rounds in particular, are intentionally seated long and these rounds will not load in some magazines. In some cases they are seated so long that a special deep throated chamber is required on the gun and they are feed by hand. I would encourage you to safely chamber one of these rounds then eject it and look for signs of the bullet engaging the rifling. There must be space between the bullet and the rifling or unsafe pressure can result in addition to running the risk of seating the bullet deeper into the case which can magnify the problem. Sooting up the bullet with candle smoke can help with this since the bright copper will be easy to see if it hits the rifling If you do see signs of the rifling DO NOT shoot these rounds in your gun. It might be a good idea to have a qualified Smith gauge your chamber so you know just how long is too long in your gun. ETA: Not all mags are created equal they may work in another mag |
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Quoted: Simple answer is yes, but...Theres always a but.... There is a Max Case Overall Length for any given bullet and case combination and it can vary by bullet type and weight. That being said some of the heaver rounds, match rounds in particular, are intentionally seated long and these rounds will not load in some magazines. In some cases they are seated so long that a special deep throated chamber is required on the gun and they are feed by hand. I would encourage you to safely chamber one of these rounds then eject it and look for signs of the bullet engaging the rifling. There must be space between the bullet and the rifling or unsafe pressure can result in addition to running the risk of seating the bullet deeper into the case which can magnify the problem. Sooting up the bullet with candle smoke can help with this since the bright copper will be easy to see if it hits the rifling If you do see signs of the rifling DO NOT shoot these rounds in your gun. It might be a good idea to have a qualified Smith gauge your chamber so you know just how long is too long in your gun. ETA: Not all mags are created equal they may work in another mag[/quot Thats good info. Although... I've been shooting BH- BB 69gr SMK useing the same 20 round C Products mags with no prblem. |
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