This advice makes sense to me and is from a writer namedsemisane at a nother site:

tight, loose and snug are pretty subjective terms and could even be dependent on the arm strenght or height of the person loading the gun. I don't know of anywhere you can find pounds of pressure data.

Here's my personal guide.

- If I can seat the load with just my thumb and two fingers on the rod, it's too loose.

- If I can seat it with one long stroke and a firm one hand grip on the rod, it's probably going to shoot well.

- If I can seat it with one long stroke, but it takes both hands on the rod, it's probably going to be better. This is the fit I'm looking for.

- If it takes both hands on the rod and stop/start short stroke increments to get it down the bore, it might shoot well, but I won't bother with it.