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Posted: 1/4/2012 11:25:13 PM EDT
Since M855a1 lacks the steel penetrator, will it be significantly shorter than M855? From my experience, some 1-12 twist barrels are able to fire regular length 62 grain bullets where as M855 is about as long as a regular 69 grain bullet.
Link Posted: 1/5/2012 2:12:20 AM EDT
Since it is lead-free, I imagine it would be as long or longer than the "leaded" M855
Link Posted: 1/5/2012 2:56:36 AM EDT
Originally Posted By Blain:
Since M855a1 lacks the steel penetrator, will it be significantly shorter than M855? From my experience, some 1-12 twist barrels are able to fire regular length 62 grain bullets where as M855 is about as long as a regular 69 grain bullet.


Are you confusing this with SOST? The A1 has a larger penetrator than the standard M855. The SOST round is an OTM that has no penetrator.
Link Posted: 1/5/2012 4:33:20 AM EDT
Link Posted: 1/5/2012 10:43:56 AM EDT
anyone know the weight of the A1 steel penetrator
Link Posted: 1/5/2012 10:55:21 AM EDT
I want some darn it
Link Posted: 1/5/2012 11:28:58 AM EDT
Link Posted: 1/7/2012 5:59:20 PM EDT
Originally Posted By Eric802:
Originally Posted By sinlessorrow:
http://accurateshooter.net/Blog/m855a102.jpg

I love that pic, but it is of an older design of the round. I don't think it has that bismuth/tin alloy at the base anymore, I'm pretty sure it's just copper down there now.

You're right, the bismuth alloy slug has been replaced by a copper slug. But otherwise the current version is still as shown in the pic.
Link Posted: 1/7/2012 6:51:46 PM EDT
Is it as long as the M856 tracer that needs a 1:7 barrel to stabilize?
Link Posted: 1/7/2012 8:38:31 PM EDT
[Last Edit: 1/7/2012 8:39:21 PM EDT by stanc]
Originally Posted By wrc777:
Is it as long as the M856 tracer that needs a 1:7 barrel to stabilize?

I don't have exact figures, but I'm fairly sure the M855A1 bullet is not quite as long as the M856 Tracer.

In a photo I have of M855 and M856 side-by-side, the M856 is approx 20% longer than M855.

In the pic above, M855A1 appears to be roughly 15% longer than M855.
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