What caliber for an AR15 frame for 3 mils dial up at 600 yards that will feed out of a magazine and send a 100 plus grain bullet?
How to get 3 mils at 600 yards
- Thread starter tmpohuski7
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6mm AR. Necked down 6.5mm Grendel. 105gr at 2900-ish. Nasty little package out of an AR-15. Would be roughly 3mils to 600 if using a 50/200yd zero.
I have been reading alot. 6mm AR turbo, 243 wssm, 25 wssm, 6.5 wssm and so on. still looking for hard evidence of 2900 fps plus reliable from mag 100 gr plus bullet. I know they are barrel burners. So for the 6.5 bullet in a wssm based cartridge is the start of the right combo, I think.
Hmm, yes, I re-read 6mm AR Loading Info and it does appear that 2900 with a 105gr is not likely in the 6mm AR. However, what if you necked 6.5mm Grendel down to 5.56mm, to make the 224 AR: 224 AR ? That would get the 80gr 5.56mm going at close to 2900, which would be close to the 3mils to 600...
If you went up to 6.5mm, take a look at the 107gr SMK and the 108gr Lapau Scenar. Both are approximately the same BC as a 155gr/168gr/175gr .30 cal and you will be able to get them going at close to the 3000fps from 20-22" barrels, which is the MV needed for 3mils to 600.
If you went up to 6.5mm, take a look at the 107gr SMK and the 108gr Lapau Scenar. Both are approximately the same BC as a 155gr/168gr/175gr .30 cal and you will be able to get them going at close to the 3000fps from 20-22" barrels, which is the MV needed for 3mils to 600.
