Thanks for all the feedback. Looks like I should ditch the NATO rounds. I was just going to use them to sight in the scope instead of the more expensive .308 ammo. No big deal. I'll bury it. The 30-30's & .307's are rounds I made, so I know what's in them. I'll probably take the 30-30's to camp & let someone with a 30-30 shoot them. The .307's have Speer flat nose bullets & IMR 4064 from the same lot# so I want to turn that into plinker rounds & short range hunting rounds. Anybody have a mild, accurate .308 load for 150 grainers I'll look it over. Otherwise I'll just work one up. Anyway, thanks again for the replies to this "newbie". I think this NEF & I will be good friends this season and I hope to learn a lot from you old timers!
I wouldn't 'ditch' those 7.62 NATO rounds.
If you have any in quantity, I would offer them for sale or trade towards .308 - that ammo is always in demand for the M1As, FALs, HK 91s, CETMEs, etc. - even the military surplus is bringing $0.40+ a round.
Of course, if the balloon ever went up, you could use them in a pinch too.
Someone is bound to enjoy the free .30/30 rounds.
As for the .307s, since you are certain the lot is the same and you trust yourself
, you could pull up the Hodgdon/IMR site and take the 150gr & 4064 loads and take it from there:
http://data.hodgdon.com/ Like you said, just work it up from there.
PS: Cheating a little bit, their site shows:
150 GR. NOS BT IMR4064 C.O.L. 2.800" Start 43.0gr/ 2663fps/ 44,700 PSI Max 47.7C gr (compressed)/ 2903fps/ 57,100 PSI