I shoot a Savage 12 FV with a Shilen Select Match Grade Barrel 1/12 twist. Mine and my buddy's all (4 exact same rifles) like the 32 grn.Vmax with 8208 at 25.5 grns. Mixed brass doesn't seem to matter. Fantastic groups . B and C stocks, Rifle Basix Triggers set at around 6 oz. We have tried some other powders Varmint Pro has potential as a back up powder. H4198 was good but now very hard to find. Good luck with your search . The 20 Practical is a fantastic round and easy to use. Making brass is super easy , no need to fire form , just go shoot them.