|
|
Joined: Jun 2002
Posts: 9,921
Campfire Outfitter
|
OP
Campfire Outfitter
Joined: Jun 2002
Posts: 9,921 |
Any of you guys using this powder? Thoughts?
|
|
|
|
|
Joined: Apr 2004
Posts: 42,697
Campfire 'Bwana
|
|
Campfire 'Bwana
Joined: Apr 2004
Posts: 42,697 |
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...
|
|
|
|
|
Joined: Jul 2001
Posts: 60,052
Campfire Kahuna
|
Campfire Kahuna
Joined: Jul 2001
Posts: 60,052 |
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
|
|
|
|
|
Joined: Apr 2004
Posts: 42,697
Campfire 'Bwana
|
|
Campfire 'Bwana
Joined: Apr 2004
Posts: 42,697 |
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...
|
|
|
|
|
Joined: Jul 2001
Posts: 60,052
Campfire Kahuna
|
|
Campfire Kahuna
Joined: Jul 2001
Posts: 60,052 |
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
|
|
|
|
|
Joined: Apr 2004
Posts: 42,697
Campfire 'Bwana
|
|
Campfire 'Bwana
Joined: Apr 2004
Posts: 42,697 |
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?
|
|
|
|
|
Joined: Sep 2009
Posts: 13,860
Campfire Outfitter
|
|
Campfire Outfitter
Joined: Sep 2009
Posts: 13,860 |
A given volume of larger granules should burn slower, all else equal.
|
|
|
|
|
Joined: Jul 2001
Posts: 60,052
Campfire Kahuna
|
|
Campfire Kahuna
Joined: Jul 2001
Posts: 60,052 |
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
|
|
|
|
|
Joined: Jul 2001
Posts: 60,052
Campfire Kahuna
|
|
Campfire Kahuna
Joined: Jul 2001
Posts: 60,052 |
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
|
|
|
|
|
Joined: Jun 2004
Posts: 44,804
Campfire 'Bwana
|
|
Campfire 'Bwana
Joined: Jun 2004
Posts: 44,804 |
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.
|
|
|
|
|
Joined: Apr 2004
Posts: 42,697
Campfire 'Bwana
|
|
Campfire 'Bwana
Joined: Apr 2004
Posts: 42,697 |
Thanks for the education this morning Gentlemen....
cheers!
|
|
|
|
|
Joined: Aug 2007
Posts: 115,424
Campfire Sage
|
|
Campfire Sage
Joined: Aug 2007
Posts: 115,424 |
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
Trump being classless,tasteless and clueless as usual. Sorry, trump is a no tax payin pile of shiit. My young wife decided to play the field and had moved several dudes into my house
|
|
|
|
|
Joined: Sep 2009
Posts: 13,860
Campfire Outfitter
|
|
Campfire Outfitter
Joined: Sep 2009
Posts: 13,860 |
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.
|
|
|
|
|
646 members (12344mag, 1234, 163bc, 06hunter59, 17CalFan, 160user, 61 invisible),
2,357
guests, and
1,233
robots. |
|
Key:
Admin,
Global Mod,
Mod
|
|
|
Forums81
Topics1,190,621
Posts18,455,093
Members73,908
| |
Most Online11,491
Jul 7th, 2023
|
|
|
|
