I’ve been considering building a 300 NM. With Hornady’s 300 PRC is it still worth the hassle?
300wm 91gr powder
300prc 94gr powder
30 nosler 101 gr powder
300norma 103gr powder
300 norma imp 109gr powder
300 rum 113gr powder.
With the same bullet/powder there is around 150-200fps between all these cases loaded to the same pressure.
If you're going short barrel, and still want velocity, you need the big cartridges horsepower. Recoil goes up very quick above the 30 nosler. Honestly I feel the 30 nosler with 225 freebore is a great cartridge, will out perform a prc, win mag, and run right with a Norma. My problem with standard Norma is the shallow shoulder angle, it's like a big 308 case. The brass grows very quickly. The improved shoulders are much better in that regard and offers substantial capacity increase, along with recoil and blast. I have owned the win mag, nosler, Norma, Norma imp, and have shot prc and rum. The PRC and Nosler is a great cases unless you want to run heavier than 215gr bullets. Once you go heavier, the bigger cases start to pull away.
Pick what bullet you want to run, chose your goal of muzzle velocity, consider your planned barrel length, chose the case with appropriate boiler room to get your desired speeds without running high pressure to get em. Every rifle should be built with a purpose driven plan, there is no one rifle that does everything perfectly. There will always be tradeoffs in certain categories.