Read Books and Maybe Learn
Cub! You very quickly jumped in to asist BigBill on a thread highjack expounding the merits of the Roberts over the .243. I'd say you ought to prove your point not just to me but all those reading the thread, especially phishroy.
3200fps is very optimistic for a 100gr bullet in a Roberts with a 24" barrel as a matter of fact I doubt it can be done with 26" What's your load?
Here is something I posted previously:
"The following is a list of data regarding the 257 Roberts. All velocities were obtained for a 100 grain bullets. (Note that the Barnes figures are from a 100 grain X bullet.)
Hodgson Powder Manual No. 27 Data Manual states that the 257 Roberts develops 2950 feet per second in a 24 inch barrel, with 46.5 grains of IMR 4831. Note that the pressure listed is 44,300 CUP.
The Hornady Handbook of Cartridge Reloading Volume 1, states that the Roberts gets 3000 feet per second in a 22 inch barrel with 45.2 grains of IMR 4831. Pressure is not listed.
The Barnes Reloading Manual Number 3 states that the Roberts gets 3117 feet per second in a 24 inch barrel from 48 grains of IMR 4831. Pressure is not listed.
The Nosler Reloading Guide (5th Edition) listed the Roberts gaining 3092 feet per second from 45.5 grains of IMR 4831 in a 24 inch barrel. Pressure is not listed.
The Speer reloading Manual Rifle and Pistol Number 13 states that 3053 feet per second is obtained with 48 grains of IMR 4831, in a 24 inch barrel. Pressure is not stated, but the text indicates that the load does not exceed 50,000 CUP limit, the maximum industrial pressure for the Roberts +P.
It is not hard to figure out what these figures mean. As others have pointed out repeatedly, the significant velocity advantage enjoyed by more modern cartridges over the Roberts is often obtained by loading the newer cartridge to higher pressures than those of the Roberts.
Jack O’Connor says he got 3200 feet per second with his Roberts handloads by exceeding the industrial pressure standard and by exceeding the over-all maximum length. There is no reason to question this."
But we all know Jack was an idiot, so all of this can be easily dismissed.
BB