I can't help a bit as you have way more experience with this round. But I'll just say I've fallen in love with it, and can't believe I've missed it all these years. I bought a Marlin 925M and put a Simmon's 3X9 rim fire scope on it. Around here it's near impossible to take a shot beyond 100yd, so I have no idea what I've got. But at 100yd it will shoot all the Wal Mart stuff very well. It does seem to do a little better with the 40gr loads, but it's really hard to tell as I'm not a big bench rest shooter. I just love the cartridge and would love to take it east of the Cascades for a little rabbit action..