I finally came across something like what I was thinking of. I am posting the important part of this post and a link to the whole thread.I know some of you have already read this.
If anyone's interested and just for fun; I'll explain another rifle I shoot that's similar to your long range rifles only from an era long gone. Some of you may know what a slug gun is and some may not. It's not a deer gun. It's a long range muzzle loading bullet shooting black powder rifle that got it's start during the Civil War as a sniper rifle.
My rifle (modern made) has a 2" across the flats barrel of .52 cal. and shoot's an 812 gr. 2-piece lead cross paper patched bullet at 1275 fps with 145 grs. of Swiss made 1F black powder. The rifle has a 27X Mitchell scope on it and has an underhammer action with a sealed ignition. Yep you guessed it....the recoil is significant to say the least. The rifle weighs 35 lbs. It has a false muzzle and uses a toggle joint starter to get the bullet past the choke (about .0005") at the muzzle which is about 2" long. The hardest part of shooting this thing is making the 2-piece bullets. The nose piece is cast of hard lead and the base piece is cast of pure lead. I make what are called "squirt die's" to swage the nose and nose inside area and then knurl the inside of the nose on my lathe. The knurl is their so the point on the base will fill in the knurl to lock the two pieces together. The two pieces are then run through the squirt die to make one bullet. The finished bullet is 1.675" long. The theory here is that the hard nose won't "slump" on ignition while the pure lead base will "bump up" to seal the gas pressure. I use freezer wrap (meat wrapping paper) for the cross patch with the shiney side towards the riflings. Fun gun to shoot but they can be "VERY TEMPERMENTAL" about loading and cleaning. Need some exercise ? I normally shoot about 80 bullets per match (3 targets-10 shots each). You have to make a lot of sight adjustments for the different ranges and conditions which requires a lot of bullets. The gun weighs 35 lbs. and of course you have to pick it up from loading it to put it on your bench. Then after firing it you have to take it off the bench to clean it between shots and load it. The math: two X 35 lbs. X 80 shots= 2.8 tons.
If I bored anyone...sorry. Just thought you guy's might be interested in reading about another kind of "long range rifle" !
I wonder if an 812gr .52 would be adequate for small whitetail?