Re: 375 tejas (rum improved)
I think you have a very special rifle like my 300 wby that thinks it is a 30-378. You are 300 fps faster than my 375-300 ultramag and I can't see 6 grains of powder or any improvements on the ultramag that would give a 300 fps increase in a normal rifle. Not saying your wrong because my 300 wby will shoot 180 grain bullets at 3460 fps and the 200's at 3250 fps. It is way outside the norm and I think your rifle may also be. You are into 378 wby performance and the 378 is way more gun than anything off the ultramag case. Please give us updates on this rifle as your load development continues. You have a super screaming long range elk rifle for sure.
Predictions are difficult, especially when they involve the future