Good Morning
DRP-I have had the best results with the IMR stick powders; 4064, 3031, and 4895 (in that order of accuracy), and Varget (lower pressure). I do like N140, but it a bit spendy on this side of the world. It's accurate, is good as the IMR stuff, and meters much better. I buy when I see it, but it is more $$. I like W760 with magnum primers for low pressure loads in my older Lee-Metfords. Bullet selection is hit and miss (no pun!). In general, The 4T's seem to like the Sierra Boat tails, or heavier flat-based spitzers.
I have found that works best for me is to seat the bullet out as far as possible. I have, in the past, seated them a few thousandths off of the rifling, but then they don't fit into the magazine. So now, I seat them to where they just clear the magazine front. For me, cartridge overall length is between 3.045 to 3.060.
PhilB-I have used WW2 vintage ammo, with mixed results. I had some 1944 ammo, and it was all "click-bang". There is a bunch of POFstill available around over here, and it is all "click-bang" as well. I bought 1000 rounds of HXP, and that stuff is great. Consistently prints 2" to 3" groups. I get better results with my handloads, but that's just me.
And time to give credit where credit is due: attached pic is of my Savage (T-less). Mount is one of Roger Payne's repro brackets, 2/1 scope repaired by Mr. Laidler
. 6-shot group printed .83" x .75" @ 100yds with handloads. This is what I call a team effort, so thank you PL and DRP!
edit: forgot to add-Sierra 174bt's over 4064. Winchester brass w/match primers