I need to get the gun from the safe, but I have a 28 bore marked Explora, but only proof marks and no maker. The gun is a single shot break action just like a single shot shotgun. The barrel is only rifled in the last 1/3 of the barrel, starting shallow and increasing in depth. i have a bullet mold that came wit hthe gun. They weighed in at 470 grains with a little tin added to the lead. the rifle has a pistol grip, nice wood, horn plate in the rear and express sights (one standing and three folding). Any ideas? The gun is not here at my current home. I have kept it in a larger atomsphere controled / fire proof safe in a better location along with my Mannlicher rifles.