A weak band just won't hold the rifling.
I will try to get some photos. I need to build a riser to get the rest and rear bags higher.
I use my Sinclair front rest with the third leg forward. I rest the frame on the bag. I need to get a few small bags to rest my wrists on to reduce wobble. Rick doesn't permit wobble.
It is all about getting your hand on the gun exadtly the same each shot. I remove my hand and regrip for each shot as it will move on the grip. No death grip, just enough to hold on.
Trigger control and follow thru are also critical.