[GoodOlBoy]

Yeah because on a model 11 remmy it is more like a browning auto 5 (humpback) in that the bolt does more of the operation (like on a 1100) from what I remember. However! I have a solution(s) for you. Since it only does this "about every 3 rounds" it tells me a little more. (Still hard to diagnose without knowing the model)

Solution #1 IF it happens almost always on the third round. (IE #1 and #2 work 90%+) You may have a weak magazine spring that needs to be replaced. The follower isn't shoving the third round far enough back to get it in the proper position for the feed ramp to lift it. There is enough pressure against the first few rounds, but not beyond that because of the weak spring. Replace the magazine spring.

Solution #2 IF if is completely random what round number it jams on you may have a gun that is fouled with buildup on the inside. Tension be danged, if you have enough burnt powder, sand, etc up in the mechanisms around the bolt you are going to have odd behaviors, feeds, etc. That being said it may LOOK clean, and even WIPE clean, but the grime can get behind all those little moving buggers and be a real pain in the keister. Unload and dismantle the shotgun, give it a good cleaning with break free, then a light coat of oil on each part as you reassemble. Work the bolt a few times to see if it feels "better" then go test fire it.

Solution #3 The flinch. I have seen it happen (as it does with some autopistols) that a person flinching on a semi shotgun will cause it to jam now and then. (its RARE to see it on a long gun) Be certain it is fired from the shoulder (not "cowboying" from the hip) and that there is good solid shoulder meld and contact.

Additional question.
Does it do it with all types of ammo you use in the gun? IE light field, express, long range, heavy field, etc.

Richard