[I.R.Chevy]

I had a similar experience with my 300WSM and building hand loads. I was coming in 3-400 fps short on my recipes. Granted I was using a 22" barrel but again that shouldn't make up such a substantial difference.

After weeks of reloading and testing for accuracy and safety trying to attain something resembling a hot load I decided for gits and shiggles to buy some cheap-o federal 180's for testing against my home loads.

I set up the same way I always do on my table and leadsled set the target at 100 yards. Home loads are slow(2650fps) and punch a 1/2 hole. Stock Federal loads rock out at 3001fps and spray a 1 1/2 inch group.

At first I didn't believe the chrony but the truth hurts I guess....

I have since been slowly working up some hotties and have managed to match the factory loads for performance but I do see some signs of pressure after loading them multiple times.

I think guns have personalities and act all kinds of ways with all kinds of bullets. There is really no way to know before trying.