The difference between the 280 & 338 Lapula is more then "close".
With the 280 you don't get beat to death, I don't care who you are after a while recoil WILL GET TO YOU.
The difference in cost of the two rounds means more shooting for the 280, more practice gives you a better chance to hit the target at extended and close ranges.
An example, I can go through my score books for 1000 yard matches. The first 10 strings using my 300 WM wasn't bad but taper off during the second string.
Using the M1A in service rifle, my score remain pretty constant through the 20 shot match.
I just don't get wore out shooting a lighter round and end up shooting better scores.
CPT USAR Ret
USAMU Sniper School Oct '78
Distinguished Rifle Badge 1071