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With reported groups in the 1/2 MOA range, the corn cob in the tip isn\’t hurting accuracy much.
Since seating dies engage bullets on the ogive, I don\’t see how seating depth would be affected.
This bullet shoot\’s very well if loaded right. It\’s right there with the 69G. Sierra. And the same thing with the RMR 55G.
I will say out of a 20” White Oak Service Rifle upper with 1/7 twist Krieger barrel I am getting 3/4-1/2 MOA with
23.8-24 grains of IMR4064
23.5-23.7 grains of IMR8208
24.4 Vihtavuori N140
24.4-24.6 VargetIve bought several of these, loading for a 16\” heavy barrel ar 15. Im trying several different powders, the tac posted here is past the max in the ramshot book. But yall are saying it 24.6 im reading. Ill load up 10 with tac. Im going on to 2520 I see some data again on another site thats again above max 25.5.
I have cfe223 Im also going to try.To get the cob out I was just gonna try wet tumbling the bullets, no media first and see how that works.
Today, I ran a ladder load test on the RMR 69g 3GH.
OAL =2.250\”
Primers = 450CCI
Power = TAC
Brass = military mixed
AR15 PSA 16\” Upper on a PSA lower
Conditions were sunny. and mid 50\’s temps.I started out with 24.3gr and went to 25.0 gr in .1 increments of 5-shots each.
Each charge was weighed out by an RCBS ChargeMaster. Bullets were seated with a Redding seating die with a verrrry light Lee FCD crimp.
My lowest ES and SD came in at the 24.6gr load with an average 2742 fps thus backing up Jacob Wilcox\’s load.
FWIW, at the 24.8gr loads, I was still seeing a low ES and SD, but I was starting to see some pressure indications and the 25gr, loads, they were obvious with my gun.
From today\’s testing, the 24.6gr load works well in this bullet/powder combo for this particular rifle.colt m4 14.5\”
5x prism optic
bipod100 degrees
46.6% humidity24.6 Tac
Avg 2717
ES 35
SD 17
5 shots
0.715 group @ 50 yards24.8 Tac
Avg 2754
ES 34
SD 15
5 shots
0.673\” @ 50 yardsNew to forums. I\’m moving on from a .223 Savage bolt LRPV to the AR15 platform which I am trying something new.
I used 22.8 gns of Varget in that bolt gun, 80gn Noslers, coal of 2.455 and it shot very well. Since the 80s are so long I\’m going to the 69 grn in my ARs 1:8 20\” barrel, but at a cartridge overall length of 2.26 I start getting a compressed load at 24.4 grains.
So my question to anyone is: what do you think of compressing loads?A mild load compression is acceptable; and, at times may enhance round to round consistency. Another option is to use a charge drop funnel with an extension for extruded (stick) powders. It will decrease the air space between granules.
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