308 Winchester AR Only
- Thread starter padom
- Start date
Latest load that really works out of my POF 16" Revolution gas gun.
Sierra 169SMK's
LC Brass, I sort by year now and these were '07's
CCI34 primers
IMR 4064 powder
43 grains on the nose
2.820 COAL (I'll have to look up the ogive measurement and will update when I do)
.004 under fired case length (1.625 on the Hornady comparator)
10-shot group data after bulk loading on a Dillon with manual powder throw
2528.9 FPS average
SD8.0
ES 24.3
This was sub-MOA for a 10 shot group. I probably could have made it tighter but my scope was dialed for POI and I took out the "dot" to aim at.
I've since experimented with the Berger 175 OTM's with Vhitavouri 550. First load was slooooow but five shots touching. Came in at 2289 FPS but super accurate. I had one result with a higher charge that was almost as good but need to do a 10-shot proof group first. I have 185 Juggernauts arriving today and will test those on Saturday. I have a feeling both would be better with 4046 but the VV can be used in a powder thrower and it burns so clean.
Sierra 169SMK's
LC Brass, I sort by year now and these were '07's
CCI34 primers
IMR 4064 powder
43 grains on the nose
2.820 COAL (I'll have to look up the ogive measurement and will update when I do)
.004 under fired case length (1.625 on the Hornady comparator)
10-shot group data after bulk loading on a Dillon with manual powder throw
2528.9 FPS average
SD8.0
ES 24.3
This was sub-MOA for a 10 shot group. I probably could have made it tighter but my scope was dialed for POI and I took out the "dot" to aim at.
I've since experimented with the Berger 175 OTM's with Vhitavouri 550. First load was slooooow but five shots touching. Came in at 2289 FPS but super accurate. I had one result with a higher charge that was almost as good but need to do a 10-shot proof group first. I have 185 Juggernauts arriving today and will test those on Saturday. I have a feeling both would be better with 4046 but the VV can be used in a powder thrower and it burns so clean.
Last edited:
Lake city or federal brass and 41.5gr of H4895 is a great load for 168s/175s just fiddle with the seating depth
For 155s try 42gr
I have fired a ton of 155's of various flavors (150 FMJ-BT, Hornady 155 HPBT, and Sierra 155 SMK) with H4895. A charge in the 41.7-42 gr range, loaded to mag length is the ticket. Seems to work great with just about all of these, and doesn't beat the gun or brass up too much. This is with LC brass as well.
Anyone work with BLC2 in 147-155gr range? I bought some during the 2020 dry up just to have some extra powder. Only time I've used it so far was loading some 222 for a friend. Shot tight in his gun.
Tac has been working well for me with the 150 Hornady FMJ, for a cheap blaster load. 10 rounds into a solid 2 MOA out an AR 10. Still I want to try BLC2, I want to see just how tight I can get these 150s to shoot (mostly just like tinkering with loads).
Bottom group is 43gr of Tac under 150 FMJ, LC match brass and CCI 34s
Tac has been working well for me with the 150 Hornady FMJ, for a cheap blaster load. 10 rounds into a solid 2 MOA out an AR 10. Still I want to try BLC2, I want to see just how tight I can get these 150s to shoot (mostly just like tinkering with loads).
Bottom group is 43gr of Tac under 150 FMJ, LC match brass and CCI 34s
Attachments
Probably like 2400 out of my 16", the 42.5 was 2550-2600, with a short 308 I don't really care about velocity it's not like my sig 716 with a 1-5x scope is going to 1000 yards.
Sierra 169SMK
CCI 34 primers
PMC Bronze cases
IMR 4064, 43 grains
COAL 2.820 with an ogive of 2.151
2526 on average out of a 16.5" barrel, suppressed. SD's are usually single digit but for the group below it was 14 with an ES of 41 which is also higher than normal. Hot day though and may have let that last one sit in the hot chamber too long. Cold barrel, 10 shot group. It's more accurate with PMC Bronze than it is with same head stamp LC brass.
CCI 34 primers
PMC Bronze cases
IMR 4064, 43 grains
COAL 2.820 with an ogive of 2.151
2526 on average out of a 16.5" barrel, suppressed. SD's are usually single digit but for the group below it was 14 with an ES of 41 which is also higher than normal. Hot day though and may have let that last one sit in the hot chamber too long. Cold barrel, 10 shot group. It's more accurate with PMC Bronze than it is with same head stamp LC brass.
Last edited:
Nice shooting man!
I am looking for personal experience with 2 load developments that may work for hunting with an ar10 308. First one is the hornady 150gr sst. I love this bullet in 120gr for my 6.8spc so why not try it in the AR10. Second load is with the 110gr Vmax. I have 8208xbr, varget, tac, and half 1lb cans of benchmark cfe223, blc-2, 748 and staball match plus others. I have none of the popular IMR powders, half 1lb 10x but it's for 6.8spc. I don't mind get a new 1lb can I dont have thats in stock at local store., I will give GRT a look to see if info is there. With running lighter bullets at higher velocities will my 11.5oz buffer be fine and I run an adjustable gas block. I imagine there is a potential for POI running suppressed n the load to be tweaked. Tyvm and look forward to your input.
I’ve not used the SST, but I’ve loaded a few 150grain bullets and all of them ended up with a best load at 45.0 of shooters world precision. So I’m guessing a good place to look with your powders is 44-45 grains of varget or TAC.
For the 110gr VMAX I've had very good luck with CFE223 and VV N135. With the 150gr SST the best results I've had have been with Power Pro 2000MR. Neither are the most temp stable so keep that in mind.
