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Posted: 4/13/2013 7:27:45 AM EDT
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I put a handful of 5 shots groups down range today using ramshot tac, and Im pretty impressed. First time ever using it so I wasnt sure how it would do.
Sierra 69gr mk .224 24.0gr ramshot tac(24.3 is listed as max for 223 pressure) Winchester brass cci 400 primer Oal 2.255 No crimp / .003 neck tension only Rifle: Armalite national match w/ factory open sights. My last two groups, once I had everything dialed in, had four shots at .640 and .610 moa, with a fifth directly vertical another .4 & .5 inches high of the center of the group... more than likely due to using open sights not the load. In the x direction max variation was .520". It also meters really well... much better than any of the stick powders. So yea... it was a good day today. |
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Quoted:
I am using about the same combo and had to play around to get it just right but I am happy with it too.Now I am gonna try it in .308 soon.I am impressed with your group size;I need to use a scope to get those kinda groups. I shoot it in my 308 with great results. Clean burn, and very acurate. pics for proof (workup loads, so they aren't zeroed) this was from prone @ 100yds. 
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I wish they would make a ball powder that was "Extreme", that is to say, temperature insensitive. Ball powder already has the attributes of small kernel size.
I've read of temperature sensitivity causing problems for people. I'm a conservative reloader, so I won't have a problem but will still have to deal with velocity variations from season-to-season. So, even for me, temperature insensitivity would be of benefit. |
| I have burned roughly 48 lbs. of Tac in Ar's and bolt guns, and I have to say that temp sensitivity is the least of your worries. Humidity, wind and the barometer will be the things to overcome before Temp. The load I shoot with 55 grain pills is a bit over Ramshot's max, but I have seen zero pressure issues in extreme weather. Temps as low as -20, up near 100, at elevations from 2000 to near 7000 ft. Most of this shooting at 5000 ft average with temps averaging about 67*. Your chamber and seating depths will be a factor, but sensitivity is something about Tac I have not heard. |
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I have burned roughly 48 lbs. of Tac in Ar's and bolt guns, and I have to say that temp sensitivity is the least of your worries. Humidity, wind and the barometer will be the things to overcome before Temp. The load I shoot with 55 grain pills is a bit over Ramshot's max, but I have seen zero pressure issues in extreme weather. Temps as low as -20, up near 100, at elevations from 2000 to near 7000 ft. Most of this shooting at 5000 ft average with temps averaging about 67*. Your chamber and seating depths will be a factor, but sensitivity is something about Tac I have not heard. Exactly why I am conservative in my loads. Personally, I've not had a problem. |
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The new high energy ball powders from St Marks are pretty temp stable, CFE223, Superformance, Power Pro powders, AA2200 & AA2460 to name a few.
I shoot AA2200 the most(16+ lb's in the last year & 1/2) and from 30* up to 105* the loads chrono within 10 fps of the same no matter what the temp is outside(case capacity makes a larger difference), for a ball powder I don't know how it can get any better than that. They may show a little more spread in places where it gets really cold but here in LA temp sensitivity is something I worry about. EWP |
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Quoted:
The new high energy ball powders from St Marks are pretty temp stable, CFE223, Superformance, Power Pro powders, AA2200 & AA2460 to name a few. I shoot AA2200 the most(16+ lb's in the last year & 1/2) and from 30* up to 105* the loads chrono within 10 fps of the same no matter what the temp is outside(case capacity makes a larger difference), for a ball powder I don't know how it can get any better than that. They may show a little more spread in places where it gets really cold but here in LA temp sensitivity is something I worry about. EWP Ever tried N140? I've got a jug of it, but haven't opened it up yet. |
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Quoted:
I wish they would make a ball powder that was "Extreme", that is to say, temperature insensitive. Ball powder already has the attributes of small kernel size. I've read of temperature sensitivity causing problems for people. I'm a conservative reloader, so I won't have a problem but will still have to deal with velocity variations from season-to-season. So, even for me, temperature insensitivity would be of benefit. TAC is pretty temperature stable, especially when compared to a lot of other spherical powders. |
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