Originally Posted by 375fan
Have done a lot of searching of post and can't find answer I'm looking for:
What would be minimum barrel length to push 140 hybrids to 3000+ fps out of a
.260 without having to push pressure limit of an action? Planning on using a short action but not worried about oal length as will probably single load anyways.
I have 26" barrels on all of my 6.5's. Though I tend to agree that 26" is a good starting point for best performance from the 6.5's, I think you will have to go to at least a 30" barrel to get anywhere near the velocity you are chasing. Even then, you are going to have to push pressures to get to a level that is not likely to be anywhere near 3000 fps.
3000+ from a .260 case? With 140's? Without pressure? Even a 6.5-284 has to be pushed hard to get there. If you do it from a .260 case, you are not going to do it at anything near sane pressure levels.
Do yourself a favor and re-think either your desired case capacity or your velocity goals. They are not compatible.