David Tubb uses TUBBGUN™ in 33XC, cold bore, 2200 yards, 3shots/3hits. FCSA ELR World Record 

AB decided it would not count as a record. I found that out a few weeks after I shot it. At this time my son-in-law Nate still holds the current record at 2011 yards 3 shots cold bore with TUBBGUN™™. This is still my personal best with 3 shots/ 3 hits cold bore at 2200 yards :)

Superior Shooting Systems Inc you will get it next time, good luck Mr. Tubb.

shot one was 3219 fps, shot two was 3210 fps, shot three was 3208 fps according to magneto speed

@@Davidtubb I don't know the role of the Tubb Dust in this; but the nose ring is huge. When we get velocity at the target in 1,000 yd. F-class, via the electronic targets, you can see that the through-the-target velocity varies much more than the muzzle velocity variation. And all of this translates to the water line at the target. At 2,200 yds, this variation will prevent anyone from matching your results, unless they do what you do. The consistency provided by the nose ring is essential to consistent trajectory, ergo consistent results. I'm betting that the Tubb Dust has a similar advantage. I'll review your interview about that. Fabulous products and adaptation to the demands of the situation at ULR.

After shooting a .338 Lapua Improved and then necking it up to .375 followed by 3 different .375 Cheytacs, I came to definitive conclusions about what I think would be the better cartridge approach to shooting ELR. The best results will always be from a qualified single source supplier. This means that the brass cartridge/resize die/seating die/chamber specifications all work hand in hand with results being a better product for the end user. This is exactly what is occurring with the 33XC and 37XC cartridges and their components being purchased through Superior Shooting Systems (www.davidtubb.com). In my opinion, for the average user, the .338 Lapua Improved is too much work. There is an ill-conceived design surrounding the .338 Lapua Improved as the current reamer head spacing as well as available resize die parameters work to create a short case life. The end result gives approximately 10 grains more powder capacity. Necking the .338 Lapua improved up to .375 is a good direction to follow. From shooting and borescoping the .375/.338 Lapua Improved, the barrel life (108 grains of H1000) was very good. I shot over 1500 rounds and the throat looked excellent at that point with velocities hovering around 2960 fps. Next, I chambered up 3 different .375 Cheytacs with the conclusion that the case is overbore (too much case capacity, but probably a good choice with a .408 bore diameter) along with too shallow a shoulder angle. The .375 Cheytac uses over 35 grains more powder to achieve only another 100 feet per second over the .375/.338 Lapua Improved. Cheytac Issues are as follows: 1. One must buy a new larger reloading press to accommodate larger diameter dies. 2. The custom dies are overpriced, and they still may not work as well as I’d like them to. 3. Need a larger action diameter - so figure a new gun is in order. Several thousand dollars later after all of this has been accomplished you now have a .375 Cheytac. From shooting and borescoping the .375 Cheytacs, the barrel life was short (2 of the barrels barely made it to 500 rounds, each with lathe turned solids). I prefer the best of both worlds along with the ability to use my TUBBGUN™ platform which allows “at the range/on the bench” caliber changes, so the 33XC (necked up to 37 XC if desired) came to life. The 33XC uses standard reloading dies along with a 7/8” x 14 tpi (threads per inch) reloading press. There is no fireforming and all the case “improving” is done in a production case (20 grains more powder capacity, 35-degree shoulder, and longer neck when compared to a .338 Lapua). This puts the various .338 Lapua wildcats and the Remington Ultra mag Improved into the “also ran” category. They simply can’t compete with the velocities attainable with the 33XC. The 33XC (eXtra Capacity) has (137.5 gr of H2O capacity) with over 127 grains of useable powder capacity while leaving the .393” neck unfilled for bullet seating (as it should be) depending on the powder density and drop tube length. Both the 33XC and 37XC are based off of a .580” bolt head. A fired case will extract with ease when using a properly polished chamber with a maximum powder charge and resized in the Superior Shooting Systems A7 tool steel resize die. This 33XC/37XC die small bases the case head which is vitally important for accuracy.

So I would assume there's a pinnacle to case efficiency for a given cartridge, seems like industry is moving toward SAUM case designs (I'm assuming they're more efficient), is there an ultimate case width/length to projectile width ratio? Also whats the ideal shoulder angle?

@@beachboardfan9544 that's all a matter of opinion depending on who are talking to. My goal with the 33XC and 37 XC case design was accuracy and longer barrel life.