Gotta love it! A guy with no, zeero, nada experience hops into reloading with a .338 Lapua and a .50 BMG. What can go wrong!!!!
Sheite. Still has provided no details as to bullet design and weight, powder, charge weight, and now, after the fact, trims cases, but it seems to me he may have trimmed BEFORE he resized.
My advice is to buy and read the how-to in two different reloading manuals - Seirra and Hornady come to mind - about the best $150 he will ever spend. Then, pick a nice, old moderate pressure round - his .30'06 is ideal - shoot it in a ridiculously strong action - Rem 700 comes to mind, and learn how to handload. Oh and a volume of the ABC's hould be on every handloader's bench. Ain't much you need to know about making ammo that ain't covered in ABC's.
To F/L re-size .50 BMG, he likely needs to integrate a couple of steel plates into his bench, with a sandwich of plywood benchtop epoxied between. That will stiffen up a benchtop so you can tip the whole thing over before the benchtop fails! And, maybe some lube - Imperial sizing Die wax is likely the best for cases like the .50, and Unique makes a case lube that is very fine as well. Read and heed.
Can't say I agree with notsorichguy. Reloading is not dangerous. But it does take a modicum of caution, a tad of common sense, a willingness to work at learning, and the sense to spend some amount of money to buy the right references and right tools. Oh, and maybe to rely on those references, and not the wondernet for instruction!!