NO MORE Sticky Bolt
I don't have the low wall versus High answer, but I did get to the range today and confirm my suspicions about sticky bolts.
From black powder days, it was well known that hot gases mixing with Petro based oils makes for a very sticky solution. I had a funny feeling that the bolt on my M44, and 91/30 were sticking, not so much due to spacing or ammo, but the oil/hot residue mix. To overcome the problem in black powder fire arms, a mix of non-petro based lubricants is used. Usually, it consists of Burt's bees wax,(the carrier) some Olive Oil and a little Bore butter. This concoction is mixed over a heat source, liquified and allowed to cool.
I had some left over and took it to the range along with all the Ammo that usually caused the bolt to stick... Steel cased, copper washed, and Hunkie heavy ball seem to be the prime examples. The M44 usually becomes a little sticky after only 5 rounds, while the 91/30 takes a few more. Today, I started by taking an oversized patch and wiping out the chamber. Then with a very small dab on a finger I wiped the cases of the first 5. They went through the M44 like butter, ejecting so smoothly I could keep the butt on my sholder. I continued firing another 30 rounds, and the bolt never hesitated in the least. I had the same results with the 91/30. I'm guessing that the non-petro oils pretty much stayed on the chamber walls once introduced.
I would sure like some independent confirmation, but I'm convinced!
KKKKFL