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AR COMP #8833062 05/03/14
Joined: Jun 2002 Posts: 9,921 Alaska B bearstalker OP Campfire Outfitter
OP bearstalker Campfire Outfitter B Joined: Jun 2002 Posts: 9,921 Alaska	Any of you guys using this powder? Thoughts?

GB1

Re: AR COMP bearstalker #8833158 05/03/14
Joined: Apr 2004 Posts: 42,803 Likes: 1 Southern Oregon USA S Seafire Campfire 'Bwana
Seafire Campfire 'Bwana S Joined: Apr 2004 Posts: 42,803 Likes: 1 Southern Oregon USA	I was using it until I can't find it anymore... an article called it a Swedish version of Varget... I liked it a lot better than Varget.... it is like a Temp Insensitive version of RL 15.... super accurate and outstanding accuracy.... If I was only going to stock 4 or 5 powders, AR Comp would definitely make the list... next time I see it available again in 8 lb containers.. I plan on purchasing 2 or 3 of them... I've tested it in the 223, 22.250, 243, 6mm Rem, 260 Rem, 6.5 x 55 and 7 x 57....and it did GREAT in each one...even better than RL 15...which is definitely no slouch...

Re: AR COMP Seafire #8834778 05/04/14
Joined: Jul 2001 Posts: 60,138 Likes: 10 Banana Belt, Montana M Mule Deer Campfire Kahuna
Mule Deer Campfire Kahuna M Joined: Jul 2001 Posts: 60,138 Likes: 10 Banana Belt, Montana	Actually, RL-15 is pretty temp-resistant. Or at least it has been since the formula was "adjusted" about a dozen years ago to meet U.S. mil-specs. “Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck

Re: AR COMP Mule Deer #8834906 05/04/14
Joined: Apr 2004 Posts: 42,803 Likes: 1 Southern Oregon USA S Seafire Campfire 'Bwana
Seafire Campfire 'Bwana S Joined: Apr 2004 Posts: 42,803 Likes: 1 Southern Oregon USA	I thought so JB, but I am sure the guys in marketing dept, thought 'lets come out with some other packaging, and label RL 15 with a new name also, and sell it as temp resistant...' AR Comp is probably RL 15, in a different container is all.... wouldn't surprise me... especially being in sales and marketing for 30 plus years...

Re: AR COMP Seafire #8835564 05/04/14
Joined: Jul 2001 Posts: 60,138 Likes: 10 Banana Belt, Montana M Mule Deer Campfire Kahuna
Mule Deer Campfire Kahuna M Joined: Jul 2001 Posts: 60,138 Likes: 10 Banana Belt, Montana	If it is, the dimensions have changed. Just checked some of both, and while the length of the granules runs in the same range, the diameter is different, running between .025-.027" for RL-15 and .030-.032 for AR-Comp. And external granule dimension do make a difference. No doubt they're very similar chemically. “Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck

IC B2

Re: AR COMP Mule Deer #8835802 05/04/14
Joined: Apr 2004 Posts: 42,803 Likes: 1 Southern Oregon USA S Seafire Campfire 'Bwana
Seafire Campfire 'Bwana S Joined: Apr 2004 Posts: 42,803 Likes: 1 Southern Oregon USA	Well John, in reality, are the granules just a vehicle for carrying the chemical compound that makes it all work anyway? Granules really have nothing to do with the performance of the powder, except for ease of volume reloading into small narrow necked cartridges, doesn't it?

Re: AR COMP Seafire #8835975 05/04/14
Joined: Sep 2009 Posts: 13,860 T Take_a_knee Campfire Outfitter
Take_a_knee Campfire Outfitter T Joined: Sep 2009 Posts: 13,860	A given volume of larger granules should burn slower, all else equal.

Re: AR COMP Seafire #8835994 05/04/14
Joined: Jul 2001 Posts: 60,138 Likes: 10 Banana Belt, Montana M Mule Deer Campfire Kahuna
Mule Deer Campfire Kahuna M Joined: Jul 2001 Posts: 60,138 Likes: 10 Banana Belt, Montana	John, While various chemical formulations and coatings have definite effects, so does granule shape and size. If RL-15 and AR-Comp were the same powder, they'd have the same granule diameter. “Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck

Re: AR COMP Mule Deer #8836012 05/04/14
Joined: Jul 2001 Posts: 60,138 Likes: 10 Banana Belt, Montana M Mule Deer Campfire Kahuna
Mule Deer Campfire Kahuna M Joined: Jul 2001 Posts: 60,138 Likes: 10 Banana Belt, Montana	I also just checked Alliant's data. The maximum charges for AR-Comp are about 10% lower in the .223 Remington and .308 Winchester than with RL-15 when both powders are listed with the same bullet. “Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck

Re: AR COMP Seafire #8836094 05/04/14
Joined: Jun 2004 Posts: 44,854 Likes: 3 M mathman Campfire 'Bwana
mathman Campfire 'Bwana M Joined: Jun 2004 Posts: 44,854 Likes: 3	Originally Posted by Seafire Well John, in reality, are the granules just a vehicle for carrying the chemical compound that makes it all work anyway? Granules really have nothing to do with the performance of the powder, except for ease of volume reloading into small narrow necked cartridges, doesn't it? The size and shape of the granules have a lot to do with burning characteristics. Roughly speaking, for three dimensional objects, volume grows as the cube of the dimensions, whereas surface area grows as the square. So for two granules of the same shape, the smaller one has a higher surface area to mass ratio, and hence burns relatively faster than just its lesser mass would indicate.

IC B3

Re: AR COMP mathman #8836630 05/05/14
Joined: Apr 2004 Posts: 42,803 Likes: 1 Southern Oregon USA S Seafire Campfire 'Bwana
Seafire Campfire 'Bwana S Joined: Apr 2004 Posts: 42,803 Likes: 1 Southern Oregon USA	Thanks for the education this morning Gentlemen.... cheers!

Re: AR COMP bearstalker #8836847 05/05/14
Joined: Aug 2007 Posts: 115,424 Likes: 13 South Florida deflave Campfire Sage
deflave Campfire Sage Joined: Aug 2007 Posts: 115,424 Likes: 13 South Florida	Originally Posted by bearstalker Any of you guys using this powder? Thoughts? I've been using it in a .223. Seems a little more faster than RL 15. Groups have shrank in this particular rifle compared to CFE 223. Which scientifically means [bleep] all. But so far so good. Meters well. Travis Originally Posted by Geno67 Trump being classless,tasteless and clueless as usual. Originally Posted by Judman Sorry, trump is a no tax payin pile of shiit. Originally Posted by KSMITH My young wife decided to play the field and had moved several dudes into my house

Re: AR COMP mathman #8836879 05/05/14
Joined: Sep 2009 Posts: 13,860 T Take_a_knee Campfire Outfitter
Take_a_knee Campfire Outfitter T Joined: Sep 2009 Posts: 13,860	Originally Posted by mathman Roughly speaking, for three dimensional objects, volume grows as the cube of the dimensions, whereas surface area grows as the square. So for two granules of the same shape, the smaller one has a higher surface area to mass ratio, and hence burns relatively faster than just its lesser mass would indicate. I had some vague notion of the above but lacked the knowledge to explain it. Thanks.

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