Casper;
i usually refer to an article in the book "Wildcat Cartridges , Vol II" on the .25 Bullberry, i will have to look tomorrow, its on my desk at the office.
If i remember correctly, 87 grain bullets were up to about 2800 or so..i think the 75's will just top 3000. all this from a 14" barrel.
On their website, the load data posted is a bit conservative from Bullberry. The author's article indicated significantly faster speeds at safe pressures. I doubt there is much difference between it & the .257 JDJ, but just to be sure, i naturally had to have one of those cheap .256 barrels sent in to SSK. :wink:
got the barrel in a few days back, then got sidetracked and have not yet had time to send it in, i also had another SSK rechamber planned at the same time. too many barrels, too little time.