Quote Originally Posted by Benny View Post
Share the loads you are unhappy with, it may shed some light.

The load(s) I finally arrived at to use for hunting purposes in my Remington 750 in 308 with an 18" barrel may surprise you.
Everything, including factory ammo would give me a 2 1/2" group.
Of all things, I arrived at a load that gave me 3/4" groups at 100 yards using 150gr Remington PSPCL with 48.0gr of BL-C(2).
One of the most notorious short barrel semi/auto firearms reputed for jamming and poor groups using a so-so bullet with iffy powder is giving acceptable groups and function.
I tried the same powder/volume with 150gr Remington SP round nose and got the same groups but 1 1/4" higher and 1 3/4" left.

The short barrel "may" be a problem with certain powders. Not so much as to velocity loss but to even powder burn. BUT not necessarily needing a "fast burning" powder. Simply backing off of the volume may help dramatically.
My load is well below the max, I even dropped down near the minimum suggested (45.0gr) and still maintained the good groups.

By the way, the Remington 150gr PSPCL is published to have a muzzle velocity of 2820fps (probably in a 24" barrel). In my 18" barrel it averages 2630fps.
The same bullet with 48.0gr of BL-C(2) is averaging 2625fps, 45.0gr is averaging 2465fps.
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So far, all my loads have been with 165gr SST. I’m using LC brass and CCI primers. Powders have been W760, IMR4895, H4895, IMR4064, Varget, and RL15. I can’t remember exact charge weights at the moment (at work), but what seems funny, is that, let’s say, 40.5gr of varget will be a 3” group, 41.0gr varget will be a 1” group, 41.5gr will be 2.5”. With RL15 41.0gr 2.75”, 41.5gr 2.25”, and 42.0gr .75”.


JTD