4" at 100 is very respectable, especially for 2 barrels PM. I don't plan on having to shoot longer than 100yds but I do like the ability to do so. I am really pretty disappointed with full bore factory slugs as most of them do an abysmal job of holding onto velocity. I also know that I really can't turn my shotgun into a rifle.
If your gun is shooting into the group that you say it is, then there is something technical that I haven't gotten onto yet.
Marrakai, if you do have some of that info it would be appreciated.
In my case where I don't plan on shooting anything bigger or more dangerous than eastern whitetail, I really don't have any need for a "magnum" slug that really just acts that way out to 75 yds or so. Putting in a proper bullet would solve the problem entirely.
Right now I am just making sure that the twist on the barrel that I have on the test gun is right. 70" twist with a .615 bore and a .625 groove. When I saw the 100 yd accuracy I started to think that it was the load and not the barrel. Those slugs were standard Brenneke 2.75 and Winchester BRI style (just to test accuracy.)
I want to order up two more barrels, but not until I make this one work.
Thanks
Tom
