What is low pressure? Each person can have a different answer. I spent a lot of time and effort figuring out what was low pressure for me. In 12 gauge it is any load between 5,000-7,000psi at a velocity between 1100-1200fps. Payload can be 1 to 1 1/8 ounce for a lot of flexibility. In 20 gauge I bump it up 7,000-9,000psi for 7/8 ounce loads going 1100-1200 fps. Yes you could decrease both to 3/4 ounce but those use faster powders and often are higher than expected pressures. My gun can handle 7/8 to 1 1/8 ounce shot payloads or will not be shot.
If I am using them for hunting I bump up the shot size for more pellet energy down range rather than boost velocity, payload or pressure. I have killed hundreds of dove with 1/2 ounce to 1 ounce loads all going 1150-1200fps. It is not the loads fault, if I don’t kill a bird, it is mine. Good range distance control and refusing to take poor shots are required but even monster loads are no miracle for shooting. Take a limit of dove with less than a box of .410 shells and you have had a great shooting day.
There you have my two cents. 5,000-7,000 psi for 12 and 7,000-9,000 for 20. Trim hulls to 66-67mm and use in both 2 1/2” & 2 3/4”. Just made my life so much easier.
| 