Originally Posted by jeffersonv
I'm with you there Hyper, the more choices the better.
Though I don't technically own a .260 or a Creedmore, I am building one as we speak. (or write) I haven't decided which one yet but my barrel purchase is coming up!
I have spent some time with my neighbors .260 and love it.
Is it your understanding that one of these cartridges outperforms the other?
I based all of my comments on the premise that they were neck and neck performance wise. I believe the powder capacity and pressure is very similar for both.
Correct me if I'm wrong?
If this is the case, barrel lengths on ballistic charts should not mean much.
I think the soft shoulder on the .260 would give it an advantage in feeding.
I like the less tapered, sharper shouldered case design (I concede I might be a little funny that way) of the Creedmoor and as I said in my last post, since it is a little shorter it can more easily seat a longer bullet and still fit in the mag well.
If there is something I am missing about the .260 having a performance advantage over the Creedmoor, please clue me in!!!
Well basing what I had posted on the 260 from a 22" barrel and having acheived numbers very close to what Hornady is advertising with a 28" barrel. I would have to say that I am loosing potential velocity with a barrel 6" shorter. I of course am not going to go to a 28" barrel to prove anything one way or the other. Now I would go 26" and probably will do so in the near future to take advantage of slower powders like H-1000 and IMR-7828 and the sustained pressure curves they provide versus H-4350 or similar burn rate powders. I can't quite remember what the psi spec on the Creed was but I think it was under 60,000 psi from an article I had read. I have no idea what the 260 is at but the 7-08 is sammi at 61,000 and the 308 is 62,000 so I would guess that it would be at least 60,000 or a bit more.
My understanding of performance advantage or disadvantage is measuring velocity from two platforms the same with the same barrel length one chambered in 260 and one in creedmore with different powders bullets and so on.
I feel the advantage the 260 should have over the Creedmore is the ability to use powders slower than H-4350 and even H-4831 The Creedmore perhaps might work ok with H-4831 or a powder of similar burn rate but one of the slow boys like posted above I think is a no go. Plus if you have a 260 and run out of brass and can't find 260 brass you can reform 243 or 7-08 or even 308 yes you will have to do some neck turning if you have tight tolerances but that is part and parcel for any rifle built tight to get every bit of accuracy that can be had.
I am more than pleased with the 260 and can't fathom bulding something that is so similar that migh be problematic to get brass for in a pinch. Factory ammo for the 260 sucks no arguement with me on that one, so the Creedmore is one up in that department.
When it is all said and done you are going to build what you like and what suits you best perhaps the Creedmore will surpass the 260 which wont be much of a feat with solid support from Hornady unlike Remmy who have let the 260 wither on the vine as they have done with other good cartridges. Time will tell.