Hornady’s new 7PRC owners are finding that the 175g bullet is not living up to its 3000fps advertising. Those that buy off-the-shelf 7PRC ammo have see a drop often of 100 to 150fps in lot to lot variation. Below is a video from “Big Game Hunting Blog” that helps to understand the variation.

In part it is due to powder shortages. Hornady’s use of different powders and lots of powder can cause measurable variation as well as rifle barrel length.

Hornady uses SAAMI 24 inch barrels. A 22 inch barrel will not cut 3000fps.  The key here is that the 7PRC was designed for long range accuracy, thus powders must deliver accuracy first. 

My Browning X-Bolt Speed in 7 Rem Mag achieves 3000 fps with a 175g Nosler ABLR bullet and a 26 inch barrel (9.5 twist) with RL 22 and Vitha. 560 hand loaded powder and sub-moa accuracy.  I did however, have to experiment with powder charges to safely optimize the loads. 

For 7PRC a lot of hoopla was made of improved faster barrel twist rate differences as well for heavier target bullets. The 7PRC rifle has a 1:8 Twist but my 7 Rem does equally well with 1:9.5 Twist with hunting bullets up to 175 grains. 

Good Hunting!