Got the cut down sporter all wrapped up, have some questions on the loadout.

I've got two different projectiles to use, and a handful of powders.

I've got: Hodgdon H4198, IMR4895 & IMR4350, Accurate 5744, Win W296 & W231, and Unique.

I "believe" I want to use the IMR4350.

The projectiles are the Hornady Interlock 220gr round nose and the Sierra (2275) 175gr MatchKing HPBT.

I've seen mention of the IMR4350 and both projectiles, however the Lee manual and the Hodgdon site both do NOT list the IRM4350 for the 220gr.  In online posts, 40gr of the IMR4350 is listed as the military load for the 220 (or at least very close).  In the manuals, 40gr of the H4350 is listed as the start point for the 220gr.

For the 175gr Sierra, I can use the 180gr projectile data and work from there.  (Lee manual doesn't list a 175gr)  Nosler lists a 175gr HPBT round in 30-40 and lists a starting at 42gr - 2190fps, 44 - 2330fps, & 46gr - 2460fps max load.  I understand these are from a full barrel and my velocities will be lower.

I would like some more input on the 220gr projectiles.

Lastly, I see some of the pressure ratings on the 30-40 load break the 40k mark.  I'm not sure what the "safe" level of our old war horses are.