[Waterloo Kid]

There is a thread somewhere on 68Forums about using AA2200 with .308 with I believe 150gr pills. This is the thread where a .77" group was shot in high winds at 200 yds. I find it hard to attach much credibility to info in that thread.

Hogdon has data online that gives data for that combo with 150 gr SST's. But, at the starting load of 37.2, I experienced primers a bit flatter than I comfortably like to see. This is in a AR10. No swipes or extractor damage. Max charge for that combo is 41.3.

I dropped back to 35.2 grains from starting load and worked up .3 gr at a time to 36.7 grains, .5 gr less than starting load.
The primers seem to be a bit flatter than expected, and really all primers appear to be the same from 35.2 to 37.2. I found an accuracy node at 36.3 gr but have not chrono'ed it yet. I would like to find a node farther up the scale.

I am bumping the shoulder .002/.003 and at max ASC mag length have a jump of .055".

I am using Winchester Large Rifle Primers. I am just about out of IMR 4895 and have excess AA2200 0n hand.

Questions;

Are WLRP's soft compared to other brands?

Would I see a reduction in pressure with more jump to lands. There is plenty of room in the case to set the bullet deeper.

Anyone else have experience with AA2200 and .308?

 

[mazroth]

I was curious how it would work out using 2200 with it at one time for my 16" DDM5. I at first was just going to try the hornady 150gr fmj. Was hoping for 2600-2700 fps, plan was to use cci34s. But the 308 is on the back burner atm. If I like this new primary arms 3x prism alot, and dont keep it on a 556 ak, it will find a home on the 308. Then I will be more encouraged to load for it.

 

[BoilerUp]

Interesting. AA2200 seems too fast for 150 in .308 but I see it's listed in Western's data. Like you said above, it shows a starting load at 37.2gr, max 41.3 for the Hdy 150 SST at a 2.735 COL which is surprisingly short (to me at least, but I don't use these bullets so maybe this is typical for SSTs, like the Berger VLDs?). So, I'm surprised your seeing signs that are keeping you at such low loads. Perhaps try with #34s for Federal #210M or R 9 1/2s?

It seems like AA2200 in .308 would be better suited for 110 / 125gr bullets. I never shoot anything much below 155 in my .308, but this thread has me wondering how some light loads with some light bullets might do in my large frame ARs for my wife/kids shooting them to take some of the recoil out. I might have to play with that since I'd only be looking for accuracy to ring steel within 100-150 yds. That could be fun and I have the bullets anyway for my 300 AAC.

 

[Waterloo Kid]

Interesting. AA2200 seems too fast for 150 in .308 but I see it's listed in Western's data. Like you said above, it shows a starting load at 37.2gr, max 41.3 for the Hdy 150 SST at a 2.735 COL which is surprisingly short (to me at least, but I don't use these bullets so maybe this is typical for SSTs, like the Berger VLDs?). So, I'm surprised your seeing signs that are keeping you at such low loads. Perhaps try with #34s for Federal #210M or R 9 1/2s?

It seems like AA2200 in .308 would be better suited for 110 / 125gr bullets. I never shoot anything much below 155 in my .308, but this thread has me wondering how some light loads with some light bullets might do in my large frame ARs for my wife/kids shooting them to take some of the recoil out. I might have to play with that since I'd only be looking for accuracy to ring steel within 100-150 yds. That could be fun and I have the bullets anyway for my 300 AAC.

I am using a 2.850 OAL with a .055" jump. 2.735 would give a .170" jump. Quite a difference. Quite a jump.

I just checked a fired sized Hornady case for AA2200 capacity. The case will hold at least 46 gr without compressing.

I am now thinking that with quite a bit of excess case capacity, it might be worthwhile to try a .100" jump to lands, drop back a grain and ladder back up and see how it affects the pressure indication.

 

[Joker]

Be careful with temperature sensitivity with 2200