Could you take an educated guess as to what you could expect with a 28" tube?? If I could split the difference and get 2850fps, it still packs a hell of a punch. I am kinda torn between that and the 300 RUM with a 28" and shooting the 240g SMK, or 225g ULD.
The 338-300 Ultra is in fact a 338 EDGE I only named it that to avoid confusion about what you can chamber in it. It would be a real pisser for someone to chamber a 338 Ultra and touch it off with .100 excess headspace.
With a 30" tube 300 grain bullets it will go 2900+, some powders, some barrels, some combos all with 30" tubes will go 3000+. All I have built with a 30" tube will go 2900+. I would not add extra inches to get over 3000 fps, it is in fact just a number boundry. In practical application the difference in performance between 2920 and 3001 is minimal, in the field you won't ever tell the difference, neither will the elk you just shot through. Hope this info helps.
Thanks for chiming in. I was hoping you would see the post and give me some real numbers. That is indeed smoking velocity, and with that size bullet with the high BC makes for a very lethal weapon. I read the review on snipers paradise. Very nice. I would like to have my rifle built by October. My elk season is middle of November. I ran the numbers and they look something like this. The 240g SMK @3000fps will give you about 1750 lbs and still traveling a tad over 1800fps at 1000 yards. From a 200 zero it drops 225 and the drift in a 10mph wind is about 51 inches. Now the .338" 300g SMK starting at 2800fps, which is 200fps slower still has 2000ls of energy, and going about 1730fps. It drops 254 inches and will have 51 inches of wind drift. If you can get it going 2900fps, then it will have almost 2200lbs of energy, and going over 1800fps. Thats a lot of power at 1000 yards. I to would not want to be on the receiving end of that bullet. You are right about the elk not knowing the difference of 100fps either. Dont mater if hes getting hit with 2000lbs or 2200lbs, I think he'll still feel it either way. When I get my first couple checks from the army, I'm gonna send the money to my dad and have him send my rifle off to someone and I"ll either have the 300 RUM built or 338 EDGE built with a 28" and a brake. I think it will be an awesome LR elk/bear rifle out to 1200 yards or so, which is as far as I have a place to shoot right now to practice.