I decided to go BIGBORE with the 58x58 Pedersoli. I converted ignition to 209 MagSpark as with these barrels it gives you a true direct INLINE ML that can shoot stout loads of Blackhorn 209. Testing Conicals was highly disappointing and even paper-wrapped. However, I found the use of 560-grain custom Lead Conicals, lubed and paper-wrapped in the left barrel and Roundball patched to .015" yielded a rifle with iron sights capable of putting 2 shots, at 75 yards well under 2" -- for a double that is excellent. If I download and use an FFG at 85 to 90 grains BP or Equiv using roundballs, with the left barrel patched to .010" and right barrel to .015" it will put both holes at 50 and 75 yards in the same hole to touching. It requires regulating the load, charge, and projectile type and patience to "load develop" just as if you were regulating a $200,000 Cartridge Double-Rifle.

The 58X58 is the perfect ML season Deer, Elk and Bear Muzzleloader for a challenging hunt. The accuracy to 200 yards even with iron sights and practice is about its total limit but it will get there with accuracy and authority with 25-90 meters being the sweet spot to put ANY NA Game down in their tracks!

I have owned this rifle for over 5 years, great open sight accuracy...100 yd rifle... 4 bears & 4 Whitetails

Had this double rifle in .58 caliber and had no luck shooting round ball. Put the gun in the safe and forgot it for awhile but a light bulb went off and I tried .577 conical minis. Well this double turned into one unbelievable accurate rifle and a favorite shooter hitting point of aim at 75 yards. The barrels seemed to be regulated at 75 yards with a three to four inch spread. Great poor mans double!