You're probably okay at shorter distances, but it might not be a bad idea to try it a 150 or 200 yds to see if the groups continue to spread predictably, they may not. In the end, the season is here, and it might be good to be confident in the first barrel.

I don't know about the privy ammo, but if there's a chance that you reload down the road, see if you can save the brass from the same make and maybe same lot number. Only thoughts, good luck with it.