My Mexican match recipe starts with surplus steel case ammo. If for the SKS, Czech stuff is fine, if for the Remingotn 799, then I use Norinco.
First I remove the 123gn FMJ bullet from 10 bullets. (I actually do this for 100, but no difference)
Then I dump out all the powder from the bullets and weigh it in one pan.
Then I divide that by 10 to get the avg charge weight.
Then I subtract 1.5gns from the avg charge weight. (I used to take out 2, but went back up a little)
I then charge the cases with this new charge weight.
Then I seat a 150gn soft point.
Then I crimp using a Lee FCD.
Then I sight in.
Then I shoot the deer.
Then I cook the deer...
Anything out to 300yds is an easy shot with this in my Remington 799, and 200 easy in three of my SKS's. You could play with it further, but I just haven't bothered. Simply changing the bullets from 123 to 150gn without removing powder showed definite signs of pressure I didn't like. Taking out 1gn reduces that pressure, but still had primers I was not fond of, reducing it by a further 1.5 made it acceptable to me. And since most load data has a difference of 2-3gns less when loading 125 to 150gn bullets, I started there