With the release of the 6.5 PRC you should really consider it for all of the advantages it offered in factory rifles, ammo, brass availability etc.
Wildcats are fun and something of a bragging rights/novelty item but you will spend twice as much time, money and effort with far less support loading for and shooting them
Personally even with the short mag cases I would not build on a short action as there's no good reason to to limit yourself on mag length as longer and longer higher BC bullets keep coming out.
Some will have to explain to me the thrills if this magical PRC case. Remington came out with the 6.5rem mag in 1966 which is almost identical to the wsm case if you were to improve the shoulder and remove the belt. No they didn't have VLD high bc bullets then so I can understand why it wasn't popular back then. But we've had the wsm AND saum cases since 2001 that is the same concept as the 6.5 rem mag. Magnum power in a small action. No one gets excited still....
But then when Hornady comes out with the creedmoor which is a shorter .260 rem. Everyone acts like Hornady invented a magic cartridge when they just keep re-inventing the wheel just as they have done with the Prc which is just a 300 rcm necked Down to 6.5 cal. The 300 rcm cane out 6 years after all the other shortmags. Handloaders have been necking the Saum and WSM cases to 6.5 for years and I still haven't seen an improvement on the design from Hornady.
Case capacity is more with the WSM. COAL is going to be restricted with both cases so if I'm constricted to 2.950" then why would I not want a matter case with more powder to compensate for the deep seating.
I can get brass from 5 different manufacturers for the WSM cases, including hornday and most of all NORMA which I believe is 2nd to only Lapua brass. But I can also use the popular 270wsm along with 300/325 wsm if needed. Which gives me a hell of a lot more/ better/ cheaper choices than the PRC. I haven't bought a box of ammo in years so factory ammo means nothing to me. Factory offerings (rifles) don't mean anything to me because I'm GOING to change the barrel regardless of what factory rifle I buy. So that doesn't really matter in this case.
As for being limited to mag length, 7 rds of WsM with vld type bullets at 2.950 isn't a terrible thing. All things equal in terms of length, why would I not want the case with more capacity. I want a short action because I want a stiffer action, lighter action, smaller OAL of gun withoug sacrificing velocity, and in high stress situations, I don't want to short stroke a long action. Bolts are smaller as well and with a large bolt knob it takes NO effort manipulating the bolt even with hot rounds. Smaller stiffer springs and firing pins are also a plus. Long actions also require a stock that is notched or have a low cheekpiece because u can't remove the bolt. If I were going to build on a long action, I wouldn't be interested in a short magnum. I have too many long action guns as it is.
Lastly, those big horns look awesome for the price, but I can buy a Savage 10/11 for under 500 and it already has the accutrigger which I like. I can also change out boltknobs/ bolt faces and get a prefitted barrel and change quickly if I don't like the WSM for some reason. And I'll catch hell over this but I like the floating bolt head design as I feel that it removes the need for truing.
Anyway, maybe someone can prove to me why the PRC is better than the wsm/saum but I just don't see the lore behind it. I feel like Hornady is always playing catch up with their carteidges but they sell because people drool over them as if they are magic.
Thanks for all the replies guys!