Re: 338s compared to the 375s that shoot mono solids
cost = same for either.
performance, well ballistically, it would appear the 338 would have a slight advantage except in ENERGY, due to the higher velocity, but this is all IN THEORY... its not that simple, read on...
keep this in mind;
1. GScustom bullets are very hard to get, when you order them they take about 4-6months before you get them. They are also quite expensive. This should improve in the medium term as they are setting up distribution and later, manufacturing in the USA. It will be some time before its all off the ground however.
2. The 338 cal GSC`s i dont beleive have ever been tested at the velocities a 338snipetac can produce ~ 3500fps. I doubt anybody knows how well they work, of they work at all - there may issues with the drive bands being stripped or stability etc... its uncharted territory.
So these hypothetical considerations makes it a tough call to build a very expensive rifle 1 way or the other. We know what works with jacketed bullets in these calibers, and some other brands of solid bullets also. But not specifically like you are considering. Another consideration is the LONG 338cal RMBullet, advertised BC 1.xxx, i dont know of anyone shooting those at 3500fps either? The rpms are probably too great to survive.
the gunsmiths themselves, like dave viers or kirby allan have tried a few projectiles and probably know the comparisons better than anyone, hopefully they will chime in...