Thanks for buying the 224cal stick!
Here are some pic's of the box Hornady ammo that was made. If I recall correclty and it's been a while... think they only made one run of it. I think they ran something like a 100k rounds or so.
If you note on the box label that shows the velocity. It's shown as 2265fps. The original ammo spec. was 2100fps. I/we don't know what test barrel was made back in the 1940's and the finish length etc... also keep in mind that the velocity listed at 2265fps was taken from a 20" finish length test barrel. We did a 20" for a few different reasons. One it was in between the 16" finish and 24" finish lengths (a K98k rifle barrel is 23.5" finish). So if you would go longer... might gain a little velocity or if the barrel is shorter in length you will lose a little. So the 2265fps out of a 20" barrel and if you would chop it down to the 16.25" finish length on the MP44 series of guns.... most likely it would be right at 2100fps.
The pressure test barrel was a .311" bore x .323" groove. Did a 1-10 twist. I think the original twist spec was 1-9.45 but for all practical purposes there would be no difference on the twist and it wouldn't affect pressure at all. In fact that really light 125gr bullet would fly just fine out of a 14 twist barrel or so.
