Why not just bypass all those wanna bes that rely on marketing and get that brand new cartridge introduced in 1952, the ole 243 winchester??? More speed, more energy, more components, more factory ammo and unlike the crapmore, it was designed from the beginning for light bullets. Unless you get a custom reamer with smaller freebore and a custom blank like 1/10 vs the standard 6crapmore of 1/8 twist. Then you still don't have the case capacity of the old 243 which is why its the king of stone dead varmint cartridges and has held its own for 70 years....