[jjjxlr8]

I'm no expert, but her are some thoughts to get things rolling...

A stamped receiver is usually not as rigid as a milled receiver and will affect the way the gun oscillates.

With bolt action rifles, the "bedding" between the barrel/action and the stock is very important and directly affects the rifle's "Point of Impact" but may not affect the rifle's grouping ability. Does this apply to an AK design?

Also, what happens when the receivers heat up? Does the stamped receiver expand less consistently than a milled receiver? Could it warp slightly?

I suppose wear could also affect the accuracy, and a stamped receiver may not hold up as well as a milled receiver.

 

[jjjxlr8]

The way the round is fed into the chamber by the bolt is also important. The receiver has a direct effect here. The average shooter may not consider this, but there is room in the chamber for the round to not be purely concentric with the barrel.

Besides the receiver, the magazine can change the way this happens by placing variable loads on the bolt as it picks up a round. When fully loaded, the compressed magazine spring exerts more force on the bolt than when there is only one round left in the magazine.

 

[jjjxlr8]

There is no recoil until the bullet has left the bore at least to the point of the gas block .then reciol starts as the bolt unlocks and carrier oves rearward. This is recoil.Maybe you are looking for a diffrent word.Furthermore only ignition shock no receiver flex could accur . The receiver has no pressure on it at the moment of ignition my friends ,only the trunion. and no recoil exists because the bolt does not unlock till it has traveled at least up till the gas block . Heck its practicly out the barrel before the bolt carrier even budges . The vibration of ignition itself would have to be proven to me . In the slow speed photography from the video we see the barrel flexing but I see no flex in the receiver.

I think the recoil begins as soon as the bullet begins to move. It's basic physics. How do you define recoil with a bolt gun?