The 300 WSM is too large in diameter at body /shoulder juction to hold the bullet tightly. By the time you get far enough down the case to pic up both thicker brass and bullet tension you end up with insuffucient volume. The Remington Ultra mags didint seem to work out either. That being said Dave at PTG reamers says there is a 50 caliber RemUltraMag based reamer he made out there somewhere. From the reamer print he sent me it isnt small either.
Both brands of brass are so deviant in thickness through the body of the case.... it bulges the outside walls oddly as the bullet seats. I think I'm begining to get a clue as to why Lapua brass usually offers better consistancy.
Weatherby brass, from what JD Jones tells me works well also... But at $2.00+for Weatherby it seems as the 338 Lapua is the logical chioce.
The SOCOM brass is a custom based on the 50 AE from Starline Brass and when sectioned is amazingly consistant in taper and thickness.
The 510 shoots like a lazer.... well more like a Rainbow actually
