Thread: ADI book max’s

Originally Posted by grandpamac

Greetings again Nathan F,
This moring I looked up the Nosler data for the .223 with 69 and 70 grain projectiles. Their listed max was 24 grains of H4895 for 2,810 fps in a 20 inch barrel and a Nosler case. They list that load for a range of projectiles of that weight. I referred to the pistol data to show the differences in velocity due to the shorter barrel. A .223 pistol is just a bolt action rifle with a short barrel and a handgun stock so not loaded to a lighter pressure. Some refer to them as hand cannons. The Nosler data also shows IMR4895 as a little faster than H4895/ AR2206H. This is more in line with my results over the years and I am starting to regard the Hodgdon/ADI data as borderline hot and likely extremely hot with projectiles other than the very soft Sierra 169 grain HPBT. I strongly suggest that you do the load test I mentioned in my first post. If your cases will not hold a primer after a couple of firings then the load is too hot. This is my last post on the matter but am happy to answer questions PM or other.
Regards Grandpamac.

Yep no problem. I did another test this morning and have dialled the load back to 26.0 gns. This is getting me a 5 shot average of 2899 fps and es of 29fps with sd of 9. That will work for me. It does t seem to matter with these projectiles it’s all sub moa if not half moa. The rifle loves them. I do appreciate the concern however. Peace to you all