Re: 270 cal
I'm a model-70 freak as well.
Oddly enough my custom 300 was built on my old 20" barreled Win 70 xtr 30-06 action, haha.
Now it wears a 26" Hart & is a long action 300 WSM.
My 270 is a model-70 feather wt 270WSM.
I'm launching 140 Accubonds at roughly 3100fps.
I'm guessing with H4350 or RL-19, you could see 2950-3000 with a 140. Maybe 2900 with the short pipe.
But RL-19 & 130's should be a good combo in the 3000-3075 range.
If you had a longer pipe & could take advantage if slower powders id say bump it up to a 150 strictly for B.C. gain to aid in bucking wind. But I love my 140 Ab's. They have a .496 g1 B.C.
Google Nosler.com, or shootersproshop.com for load info, & run it thru JBM Ballistics Calculator to see what will fit your needs.
I'm sure somebody will chime in soon. If not, send a p.m. to royinidaho, & he'll square you away. He manages to squeeze every last fps out of a 270 win without blowing himself up.
"Its not Rocket Surgery.....'
GOD,GUNS,&GUTTS MADE AMERICA, LETS KEEP ALL 3!winmag
"I have No idea why that cop made me ride in the back seat, when I Clearly called Shotgun!"