Imr 4064 vs accurate 4064 (AA)

S

sig220mwxxxx

New member
I have not been able to find Imr 4064 since the buying frenzy started. I can however find AA 4064. It is next in line behind Imr 4064 on the burn rate chart meaning it is either the same rate or just a tad slower. Have any of you used it and if so how is it? I use Imr 4064 for 22-250 mainly but also 7.5x55 and 8mm mauser along with Imr 4350. Have found a source that actually has several pounds on the shelf but the fact that there is so much left makes me wonder about it's usefulness.
 
I bought 8 lbs. on sale once and could not tell the difference between IMR. Natually work up your loads as between lots but I bet you will end up with nearly the same load as with your IMR.
 
I bought several kegs of AA4064.

It is a shorter cut powder than IMR 4064 and thus meters better.

I developed some loads in 223 and 308 Win. In my Kreiger Barreled match rifle I got the velocities I wanted but not in the Wilson barrel AR15. I could not get more than 24.0 grains in a 223 case without extraordinary measures. Kreiger barrels are tight and loads developed in a Wilson or Douglas will blow primers in a Kreiger. With the new brass colored WSR, I had to cut loads to 22.5 or 23.0 because I pierced primers during rapid fire. This was disappointing as 23.5 grs AA4064 with a 69 SMK did not pierce primers with the older nickel plated WSR.

My lot of AA4064 shoots exceptionally tight groups in the 223 and I won my class and got medals shooting it at 200 and 300 yards at Camp Perry in the Kreiger barreled rifle.

But, in the 308 Win, I get over pressure indications at velocities less than what I can get with IMR 4064. The 190 grain loads are just too slow for 1000 yard work.

I have shot a 175 SMK 41.5 grains AA4064 LC cases CCI #34 at 600 yards and only dropped a couple of points, even though the velocity is less than what I want, the load was accurate.

It is a good powder within its limitations.



Code: 
[SIZE="3"]
[B]223 Remington  24" 1:8 Kreiger Barrel [/B]
			
69 Sierra 21.5 grains N135 LC mixed WSR (Brass)	OAL	2.25	
			
2-Jul-04	T = 80° F						
Ave Vel =	2818				 	 	
Std Dev =	20				 	 	
ES =	70				 	 	
Low =	2776				 	 	
High =	2846				 		
N =	10		 				
							
69 Sierra 23.5  grains AA4064  lot 5902  Fed cases WSR (Brass)	OAL	2.25
5-Aug-05	T = 100° F						
Ave Vel =	2855				 	 	
Std Dev =	31				 	 	
ES =	83				 	 	
Low =	2817				 	 	
High =	2900				 	 	
N =	10		 				
							
69 Sierra 24.0  grains AA4064  wtd lot 5902  S&B cases WSR (Brass) OAL	2.25
2-Jul-04	T = 80° F						
Ave Vel =	2937					 	
Std Dev =	25					 	
ES =	81					
Low =	2880					
High =	2961						
N =	10						
							
Fairly Flat primers	Best group						
							
							
69 Sierra 24.5  grains AA4064 wtd  lot 5902 S&B cases WSR (Brass) OAL	2.25
	
2-Jul-04 T = 80° F	
							
Ave Vel =	2988					 	
Std Dev =	20					 	
ES =	76					
Low =	2955					
High =	3031						
N =	14						
Flat primers	Excellent 15 shot group						


[B]223 Remington Rock River Arms NM LAR-15 			
20" 1:8 Stainless Wilson barrel,					
			[/B]				
							
69 Sierra 24.0 grains AA2520 LC mixed WSR (Brass)	OAL	2.25	
22-Aug-04	T = 75° F						
Ave Vel =	2798						
Std Dev =	24						
ES =	95						
Low =	2756						
High =	2851						
N =	16						
							


[B]308 Win Ruger M77 MKII 	26 " Barrel 1:10 twist[/B]	
						
174 FMJBT LC79 Match M118 White Box 			
18 Dec 2010 T =  40 °F					
						
Ave Vel =	2546			 		
Std Dev =	17					
ES =	41					
High =	2572					
Low =	2531					
N =	5					
						
174 FMJBT 41.0 grs AA4064 wtd Lot 5902 LC mixed CCI#34 OAL 2.800"
						
29 Dec 2010 T =  40 °F					
						
Ave Vel =	2495					
Std Dev =	11					
ES =	36					
High =	2514					
Low =	2478					
N =	10					
						
						
						
174 FMJBT 41.5 grs AA4064 wtd Lot 5902 LC mixed CCI#34 OAL 2.800"
						
29 Dec 2010 T =  40 °F					
						
Ave Vel =	2520					
Std Dev =	21					
ES =	68					
High =	2551					
Low =	2483					
N =	10					
						
174 FMJBT 42.0 grs AA4064 wtd Lot 5902 LC mixed CCI#34 OAL 2.800"
						
29 Dec 2010 T =  40 °F					
						
Ave Vel =	2555					
Std Dev =	21					
ES =	73					
High =	2599					
Low =	2526					
N =	10					
						
		
						
174 FMJBT 42.5 grs AA4064 wtd Lot 5902 LC mixed CCI#34 OAL 2.800"
						
29 Dec 2010 T =  40 °F					
						
Ave Vel =	2575					
Std Dev =	23					
ES =	76				
High =	2610					
Low =	2534				
N =	10					
						
Two rounds sticky extraction, over max load






190 Hornady Match  41.0 grs AA 4064 wtd lot 5902 	170grs ≤ Fed cases ≤ 175 grs Fed 210S	OAL 2.850	
				
	19-Oct-04		T = 77  ° F				
Ave Vel =	2465		2483	 	 	excellent group
Std Dev =	14		2460	 	 	 	
ES =	31		2452	 	 	 	
Low =	2452		2453	 	 	 	
High =	2483		2475	 	 	 	
N =	5		 				
							
190 Hornady Match  41.5 grs AA 4064 wtd lot 5902 	OAL 2.850	170grs ≤ Fed cases ≤ 175 grs Fed 210S	
	19-Oct-04	T = 79  ° F		
							
Ave Vel =	2493		2489	 	 	
Std Dev =	5		2490	 	 	 	
ES =	12		2495	 	 	 	
Low =	2489		2501	 	 	 	
High =	2501		2490	 	 	 	
N =	5		 				
							
excellent group							
							
							
190 Hornady Match  42.0 grs AA 4064 wtd lot 5902 	OAL 2.850		
		170grs ≤ Fed cases ≤ 175 grs Fed 210S		
19-Oct-04	T = 79  ° F						
Ave Vel =	2536				 	
Std Dev =	10				 	 	
ES =	34				 	 	
Low =	2522				 	 	
High =	2556				 	 	
N =	10		 				
	excellent group						




[/SIZE]
 
Slamfire, what do you think about AA4064 in 5.56 LC brass with a Hornady 75gr?

I loaded a few up from 22.5-24.5gr set to 2.25 OAL. The 24.5gr really got crushed and because the BTHP has a lot of room in the hollow point cavity it deformed from the press. Basically it made the loads pinch the tip making it now 2.26 OAL. I didn't want to press them down further because that'd set them to low because it was the tip giving a longer reading. I just sand papered the tips back down to 2.25.

I did notice the LC brass was fine but I couldn't load any 223 brass as the powder came way up into the neck. Any advice?
 
I've used both, worked up loads for 243 Win and 30/06. I found no more difference than in different lot numbers of the same powder. I don't shoot the groups most of these guys do but i do OK.
 
For my Garand - I loaded 46.5 gr of AA4064 with a 147 gr FMJBT in military cases and got an average of 2543.8 FPS with 28.4 stdev. It worked fine.
 
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