I pushed a few .2165 slugs through my 700mm CZ barrel just to check for tight chokes or whatever else. What I discovered is that there is little to no choke whatsoever which should be good for shooting slugs. However, I also discovered that the bore was pretty tight on the breech end...the first 1/2"-1" was quite tight. I pushed slugs through from both directions. When pushing from the breech end it's really tight for the first inch and then the rest of the way it is very free. When pushing from the muzzle end it's a little tight for the first half inch or so and then moderately free all the way to the breech where it gets fairly tight again for that last inch. Is this how barrels are designed or is the tightness of the breech end going to disfigure the slug too much for the rifling to engage properly?
I also tried .217 lighter and shorter slugs and the tightness of the breech compared to the rest of the barrel was magnified. It felt like the slug had zero resistance after the first inch of tightness at the breech.
I also tried .217 lighter and shorter slugs and the tightness of the breech compared to the rest of the barrel was magnified. It felt like the slug had zero resistance after the first inch of tightness at the breech.
