I haven't tried straight olive oil as a lube except back in the 80's for moose. It was the same as most everything else - at -40, it was solid/hard.

That is when I experimented with paper ctgs. in my 14 bore rifle. They (tight fit) worked perfectly and shot exactly the same as tightly cloth patched round balls.

One of the lads on a different, ml forum, tested the paper ctgs. as described and found they worked down in bore size, to 28 bore (.54). Smaller than .54, as in .45 and .50, the pressures were too high and destroyed the paper patching.

I would suggest to use them in .58's and larger, if not wanting to experiment with different lubes with cloth patches.

I was able to fire 10 shots with paper ctgs. in my .69 (14 bore) without loss in accuracy with the paper ctgs. before needing to fire a wet cloth patched ball for 'cleaning' purposes.

The paper ctgs. which were very tight in the bore, did not fragment or burn/catch fire - never. If they do, they are not tight enough.