I'd check with the load data for Trail Boss first. Then I'd work up to the max they suggest. This will give you a plinking, low speed round. AND will save your shoulder and your brass

APP products will corrode brass big time! You will have to get them rinsed out right away after each range session. This is very doo-able.I would be using 3Fg Pinnacle Powder, being very compressed, for bestpower and accuracy results.