I read this thread a week or two ago so I went and picked up some PP Varmint and MR2000.
I could get the 200 TSX going about 2950 with a book max charge of Varmint from my 20" Whelen but accuracy was better between 2815-2850.
With the 250 Speer a max load of MR2000 got me 2629 with no obvious pressure signs and tested at 90+ degrees.
Shot the the 250 for accuracy this morning and it looks like upper end is where my rifle likes to be. Hoping to confirm accuracy tomorrow. If it works out accuracy wise a 250 speer at 2600+ from a 20" Whelen can do a lot of work from up close to quite a ways out. Pretty interesting and curbs my interest in adding a .358 Norma. FWIW my rifle is a paddle stock ruger and the 250 loaded hot is plenty snorty on the way back.
Dammmmm... I chronographed some factory loaded 250 gr 358 Norma Mag at 2630fps out of a 22" barrel. They were rated at 2799 unspecified barrel length on the card that came in the box signed by Kerstin. Since the same powders seem to work in the Norma as the Whelen I'll betcha the Norma can be boosted as well. Will be trying MR2000 & CFE223 in both Whelen & Norma when the weather cools down a bit. Who needs an STA?
Sacred cows make good burgers when you know what temperature to cook them at.-Rev. Billy
