This question may be silly or I am just being too anal, but here it goes: I have a Bergara LRP Elite with a Magpul PRS Adjustable Stock. The bottom of the stock is flat and measures about 5/8"-3/4" wide and then gradually become wider towards the top. I am waiting for my Dan Greenlaw front bench rest to arrive and was thinking about a rear bag. I have my eye on the Protektor Dr. Rear Rabbit bag and was wondering if 3/4" spacing would provide enough of a snug fit or would 1/2" work better. I know I may be splitting hairs, but I just don't like returning things and was wondering if anyone had an opinion. I intend to order the heavy sand with the higher rabbit ears. By the way, the rifle is 6.5 CM and I had been using a bi-pod with no rear rest with success, but not consistent success. ....thanks