Thread: 284 Hammer projectiles in my 7mm-08

Originally Posted by LJPRMC

I have been experimenting with 140 gr Absolute Hammer in my 7mm-08 . (Remmington 700 )
settled on 44.5 grains of 2208 ( 45gr is hot/ sticky lifts on bolt ) V=2900 ft/sec ave
No pressure , in Norma brass , CCI primers , COAL 2.8 , Barrell at 22 inch , accuracy better than 1 MOA .
My calcs = 1800 ft/secs/ 1000 ft/lbs at 600 yds

I like these projectiles , and have used them on deer . They work well . Look them up https://hammerbullets.com/
These projectiles are unique . They are not like other copper bullets in that the driving bands produce lower pressure that other projectiles .



NOTE TO ALL .
Gordons reloading tool predicted the load to be too DANGEROUS to use at well over 70,000 lbs of pressure and a velocity of about 3000 ft/sec .
I worked this load up from 43 grains to 45 grains. Pressure signs were evident at 45 grains in slightly flat primer and sticky bolt lift, and i "felt "the load in the recoil.
I am confident to tell all , there is no doubt this is compressed load. However, there was nothing particularly noticeable in the building of the load . I did not measure "neck tension " but did add the very slightest crimp pressure

Use this info at your own risk

Greetings @LJPRMC,
I have to agree with the Gordons reloading tool that that is a dangerously hot load. Book max for non solid copper projectiles runs between 42 and 43 grains of AR2208 so you are 2 grains north of that. Your velocity at 2,900 fps is 100 fps higher than book max loads in your barrel length another pressure warning. The extra velocity works out to about 2 extra grains of powder which is where you are. Working up looking for pressure signs often results in loads that develop pressure in the 70,000 PSI range so you are in dangerous territory by any measure. If you must have 2,900 fps a larger case is the safe option rather than over loading a 7mm-08.
Regards Grandpamac.