I suppose I need to say this... There are so many variables in the discussion concerning speed - consistency - precision. It's important to remember speed is not king. With the 338s 1fps beyond 2900fps basically extends supersonic flight by 1 yard (give or take due to DA). The difference between 2900fps and 3200 fps on a full value 5mph wind call at 2000y is right at .1mils. No question, these are benefits, but I can't help but think Ide rather focus on consistency and precision. Also, a 33xc pushed to 3200fps on average has a "very" short barrel life, though many competitors push them beyond, they are sacrificing consistency and precision.
Last weekend a 338 finished 7th against heavy guns in the Raton Thunder 1.64 match and hit the target at 3700y in the Spring Canyon match. No question, it seriously lacked in comparison to the big guns in Spring Canyon and was pushed around by the wind and vertical, but 2/3s of his misses were within .25moa of the targets.
Again, I only say all this to draw out the point, a lot of things affect the capability of a light gun, heck, a lot of things affect the capability of a heavy gun. It's true, some shooters are pushing the limit on light guns as far as they can, it's also true it's important to know where the limit is concerning consistency and precision. Personally, Lapua brass is better than Peterson brass and Ide only shoot a light gun that was chambered in a variant that uses Lapua brass. You can get low ESs with Peterson bras, but it's easier with Lapua brass. Also, in the right stock/chassis, you can run a 33" barrel on a 338 and make weight (26lb). A 338 Lapua with a long throat shooting 300gr. bullets can easily reach 3000fps (I have one). My brothers 338NMAI with a 33" barrel makes weight by 2ounces and using N570 sends a 300gr. Berger OTM to its resting place at just short of 3100fps (although he uses N565 in Comp. at 2887fps).
A lot affects capability, is a 33xc too much? could be, is a 300WSM not enough, might be. Ide rather focus on consistency and precision ..... Do that, use what you got, see just how far you can get consistently under varying conditions.... Enjoy it. IMHO