So with proper sized slugs (lets say 1/1000 under what you get when you slug your barrel) it seems that the cocking lever becomes very difficult to seat the slug.
I noticed this with my new Vulcan 3 in 25 which slugged at .2545 so I ordered some NSA 33.6 gr in .254 and they require so much force to be applied when cocking I am concerned about the long term effects of continued use.
I had the same concern with my 25 Mav but never found any slugs more accurate than 34 gr pellets so are really never became an issue.
The V3 has a 700mm CZ non chocked barrel and I bought it specifically to shoot slugs, 1st time out with the slug inventory I had (non over .250) I was really impressed with how it shot the HN 34 and 36 gr, but the NSA 36.2 in .250 were amazing!
I watched this vid
He came up with about the same results of .2545 with the V3 barrel as I, they had great results with the AVS .2553 slugs which are even larger that the NSA .254 slugs I have, so I imagine that it is even more pressure required to chamber.
To you slug shooters out there, do you just get used to the increased cocking force? Has it caused any issues with the gun?