quote:

Originally posted by Stonecreek:
AfricanHunter: I've got a Speer Manual #5 which has data for the .25 Ackley. The data is is rather extensive, so which bullet weight and powders are you interested in?

For example, the 100 grain bullet with 4831 is listed at 61, 63, and 65 grains for 3166, 3266, and 3351 FPS respectively. The 120 shows the same powder at 58, 60, and 62 grains for 3037, 3120, and 3235 respectively.

Powders include H5010 & H570, plus the entire line of IMR's 4064 through 4350 and Hi-Vel No. 2. Incidentally, if you take a shine to using a 60 grain Speer, you can launch it at 4202 FPS with a 63 grain charge of 4064.

Many years ago a good friend of mine had a .25-284 wildcat, which is not too much less in case capacity to the .25 Ackley. The rifle had a barrel just short of 27" and we got a chronograph reading of 4264 fps with a little 60 grain OPE Winchester bullet designed for the .256 Winchester. Stepping the powder up a half grain from that vaporized the bullet and all we got were pock marks in the paper screens of our Oehler Model 10.