22-243 Middlestead

[CBAILEY]

I would love to have a fast twist edition of this cartridge too, would make a better long range gun than my current one...that being said, for a calling gun, with most shots at 200 and closer, this one is my fave and not sure I'd ever swap if I had the chance...I have killed them out to 325 yards with this gun, and that was an educated public land coyote that gave me a great background to shot against...if I go out with longer ranges in mind, I take my 6.5-06 😁

[MTbroncrider]

Since I have started playing with this cartridge, and info is scarce, I'll add what I have found..remember to start low & work up

data I recieved with this rifle:
42.8gr Superformance, 75gr Hornady @ 2.737.......did not group well for me
41.5gr IMR4451, 75gr Hornady @ 2.737.....very good groups, can't find the powder so....

various searches revealed a case length max of 2.045, min of 2.025 and trim to of 2.035

cartridges of the world had limited data, but suggested 45gr IMR4350 with 65gr Soft point achieved a velocity of 3710fps

So i did a ladder test with 65gr Sierra Gameking & IMR4350, COAL of 2.600, starting at 43.2 to 45 in .3 increments
43.8gr revealed 3 overlapping holes @ 100
44.1 I got slight pressure signs (light extractor, almost flat primer)
44.4 I blew out two primers (one may be a fluke right?)
forgot my magnetospeed, sorry no velocity numbers for you, but I'm guessing in the high 3500fps arena with 43.8

I have found this gun likes a substantial jump to the lands (measured at Ogive) of .071

interesting find:
65gr GK, 73 & 75gr Hornady all have the ogive at damn near the same location from the base

in the near future (and once I find the formula again), I'd like to test 5744 and 73gr Hornady