Right to a point..... velocity is only part of the equation and not the whole. Pressures would be the main concerns here. You can do some amazing things, I have run pressures at over 80000 PSI in some guns, and they work fine, did not lock up and showed little signs of 80000 PSI. Which is extreme and dangerous in most circumstances. In one such rifle, for an Ammo manufacturer we assisted in getting a Proof load of 75000 PSI to be fired once in each rifle manufactured. Our test rifle fired 120 rounds total of 70000--80000+ PSI without a hitch over a 3 day period. This was extreme and would do serious damage to many firearms.
There is nothing free, and rarely easy when it comes to these sort of things....... I have seen many claims from many shooters over the years of grand velocities being achieved, but at a cost....... You cannot run away from Pressures, under any normal circumstances, sooner or later you pay.
That said, there can be the extremely rare circumstance that you find a magical formula. In 40 years of handloading, I actually had it happen 1 Time, One time Only.
In the very early development of the 500 MDM..... 2.8 inch RUM Case, .500 caliber, and 20 inch barrels. I had a 5 lb container of Magic Powder. I did not realize it was a magic powder at the time however, but as soon as that 5 lbs was burned, I learned. This magic powder was shooting a 500 gr CEB #13 Solid, .500 caliber at 2617 fps at 62670 PSI....... This is pretty damned impressive, and I was very impressed. The load was 102 grs of this magic powder and it tested this over many times, and many rounds...... not a fluke by any stretch........ It was tested right on down to 86 gr for 2300 fps at 46000 PSI. This was 2010.
Then in 2011, that 5 lb container was gone and replaced with another 5 lb container of the same powder........... I don't recall the exact reason I started at the bottom again with this new Container, but lucky I did, as starting with 85 gr of the new container ended up being absolute MAX at around 2400 fps. Anything more would lock up the gun and be way over max pressures, the days of 2600 fps were done and not obtainable. I tried another container, and I had to go even lower to stay under max. Had I started near the top end with the new container, I am quite sure I would have damaged the action. I immediately condemned that previous data and removed it from the system. I still have a copy of course as a reminder.
Since then, I have always been in search of the Magic Powder by blending myself with many cartridges. I have not hit the right formula, even with years of trying. I have done well, I have equaled some of the best powders, but I have not exceeded. Now its very possible I am just not talented enough to find the magic powder again, I will concede that.
Doing Pressure Data opens your eyes and without that, you can be in the dark..........
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