To get .357 or .45 Colt
I am a long time owner of a Ruger .357 Blackhawk (pre 1973 model, called a 3 screw model & I just got it upgraded by Ruger). It has a 6.5" barrel, which they do not appear to make anymore. I ue to quick draw with it, so the barrel length was not an issue. This has been an excellent hand gun, and it can shoot very powerful ammo (up to 800 muzzle ft/lbs). I have created an ammo specs Excel file showing various calibers and their ammo specs (muzzle velocity, bullet weight, muzzle energy, cost, with links as to where to buy it online, and lots more). If anyone is interested in this (to either help you buy a new gun or to just buy specific ammo) please contact me (or respond here) and I will send it to you, The calibers I cover now are: 9mm, .38 special, .357 Mag, .44 Colt, .44 Mag, .45 Long Colt, and 4-6 military weapons (rifles & cannons) for comparisons.
As for the balance issue, part of this depends on what you are use to shooting. Some people shoot mainly or exclusively 4.5" barreled hand guns, and others have 10" barrels! So, the balance issue goes far beyond what caliber to get. I suspect that when I get my new Ruger .45 Blackhawk Convertible (shoots both 45 Colt, also called Long Colt, as well as .45 ACP ammo) that it will feel slightly different from my .357 because o the barrel length.
Another issue impacting the 'balance' feel is the weight of the gun and it distribution. I suspect the actual weight distribution is fairly standard in today's hand guns. But barrel length may impact this also, so a Ruger Blackhawk 7.5" barrel (produces more powerful loads simply due to the barrel length), will feel very different for a Ruger Blackhawk 4.5". Again, this is not so much a caliber issue. The Ruger .357 Magnum up to the .44 Magnum use the same frame, so a .22 Ruger will feel very different!
I believe the bottom line is what do you want to accomplish with this hand gun. Do you ever want to go hunting and take down large wild life, or just small wild life, or just target practice? If you only do the latter, then the .357 is the best bet because you can readily get ammo, and at relatively low costs ($.52-$.75 per round new and under $.26-$.50 for .38 Special ammo), If you get a .45 Colt, the ammo varies a lot, but is typically around $.75-$1.50 per round. On another front, the .357 muzzle energy varies (depending on the cartridge & ammo manufacturer) from ~400 ft/lbs to 800 ft/lbs, while the .45 Colt varies from 300 ft/lbs (cowboy loads) up to 1,300 ft/lbs, almost as powerful as the 44 Magnum, and 50% more power than the greatest .357 new cartridge load.
One more last comment on how a hand gun feels - it is the grip. If you are looking beyond the Ruger Blackhawks, then the grip style vary GREATLY! But if you stick with the Ruger (or similar hand gun) then the texture of the grip AND ITS WIDTH will make a big difference. I changed the original Ruger grips on my hand gun to nice, thicker pearl grips. Not only does the gun look sharp and elegant, but it "feels" much nicer and is easier to hold and shoot. High power hand guns have a kick, and the handle has a lot to do with how much the gun moves in your hand.
So, my basic recommendation is to get the smaller caliber - the .357 Blackhawk unless you are going to definitely go "big" game hunting an need more power from the .45. One more thing to note - the Ruger .45 Blackhawk comes n 2 versions, and the second one is called the Convertible, This means it shoots both the 45 Long Colt ammo, AND .45 ACP ammo. To accomplish this, it comes with a second cylinder, one just for the .45 ACP ammo. This ammo you can sometimes get for $.50 per round also, thus reducing the cost of ownership of the 45 Colt. This is the model I am planning on buying soon - the 5.5" Ruger Blackhawk 45 Convertible!
Vincent 06012014