i have a .62 and a .54.. the .54 will kick the .62s butt on most days for accuracy.. . i like the .62 best for hunting.. im in elk country and if i get a little ahead and into the shoulder i can depend on the .62 in that case.. but ive studied the two quite abit.. the type of sights are different on the two and it makes a definite difference... there is alot more room around the sides of the blade in the rear sight knotch and that helps a huge bunch in low light when i shoot the guns off after a day of hunting at closing time.. the .54 is heavier than the .62, it weights 9 1/2 pounds and its weight lies in the barrel, this is really important for accuarcy as it dampens recoil when being held offhand or kneeling and gives better accuracy becouse of hold and recoil.. my 54 uses a light load and its less recoil helps point of impact variations in the differnt shooting possitons. i shoot a heavy load in the .62 and different positions recoil differently.. tight/ hold light hold can really screw up point of impact on a heavy loaded lighter gun.. the .54 is broke in and an old gun with 8 ounce set trigger. this really helps me.. the .62 is my favorite hunter, the .54 is my target rifle, but goes on as a backup when hunting,.. so caliber is not all that there is to it.. to me the .58 wins hands down but the .54 is a great gun and i can see why anyone would want one.... there actually is a big difference in the two calibers in my opinion.. but the gun style, lenght, sights as ive said, weight, trigger pull, cast off/strait stock, rifling depth, land width, round bottom grooves/square grooves, twist rate, coned muzzel or not, set trigger,doulbe trigger, room in the trigger guard,sling, barrel strait/swamped, , all this and more can make two guns of the same caliber totally different.. :hmm: and as a last note, a well thought out well made gun is a better choice than the perfect caliber that isnt put together right.. dave..