I own and shoot both. The flat back really has no bearing (pun intended) on how tightly the bolt lugs lock up in the receiver. If you examine the target single shot actions, they are much stiffer than a conventional receiver and that is supposed to make them more accurate. I can see where if you had a very heavy scope, there might be a little more flex on the flat back receiver than on the round, but I have not experienced any difference in accuracy with mine. If there is any difference in accuracy between the flat and round back receivers, it is less than that introduced by my old shaky body. That is just my opinion.. Blitzfike
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