In 2008 I had a build commissioned off a Surgeon XL action. 30" Krieger 9 twist, McMillan Anschutz style stock, in a cartridge called the 30-375R-P, based off the 375 Ruger case.
It was the GS's brain child as what he thought would be a great 1000Y benchrest cartridge. It's nearly identical to 300PRC.
Right off I'll tell you that I'm no benchrest shooter.
But I did have some small groups with it over the years. When working a load up on the just broke in barrel the smallest was .080" for 3 shots and the next group was in the .1's. So I chose this load which was a 240gr smk at 2900 fps.
With this load I was right with my friend shooting side by side against his 338L using 250gr smk at ELR distances up to 1900 yards.
Later on when the Berger 230gr hybrid came out I did a ladder test at 300Y in .2 grain increments and had 3 consecutive shots touching so I didn't even change the seating depth and chose the middle charge. This was 230's at 2930 fps.
With this load I was also neck in neck shooting ELR with the same guy after he changed over to 300gr smk.
Years later I won a ELR match with this rifle shooting against mostly 338's and 50's. I hit the 2365 yard plate on the first shot.
I also won 3-4 steel matches out to 1450Y. I could still self spot at distance because of the low-ish recoil and it helped making corrections by seeing the "large" dust signature those big 230's created. As well as giving .2-.3 mils less windage as my 6x47 had. Very fun hearing how loud that bullet hit the steel too! Ha, we had one small steel at 400Y that was attached to a big spring, had to engage it twice within 10 seconds, those 230's hit it "too hard", making it go absolutely crazy, so I almost didn't have time to get it the second time!
I liked that I could seat these heavy bullets above the NSJ to take advantage of all the powder capacity and still use the 5 and 10 shot AI magazines.
I like the low recoil comparatively to the 338's. My rifle is 23lbs with a brake so it's very soft shooting.
Lastly, I visited an acquaintance ELR shooter I'd met on a forum. He, his 3 friends and I went out for his ELR practice session from 1450Y to 2100Y. Not bragging but I hit almost as much as all of them put together. It wasn't my shooting skills just that the cartridge had small vertical and did well enough in the wind to be the most consistent there that day. Ha, as luck would have it, the next day the barrel died, it had 1500 rounds through it.
My smallest 5 shot group at 1000Y was 2.5" tall and 4" wide on steel. That's not bad off a wobbly Harris bipod and a tactical rear bag. In the right hands, etc, I think this rifle/cartridge would have been capable of winning in benchrest or F class.
All I'm saying is the 300PRC strikes a good balance in powder capacity, using heavy bullets, at 2900-ish fps, in a longer barrel, while getting decent barrel life. I used Hornady brass and most lasted over 10 cycles so I wasn't pushing the case.
Could the 300PRC be to the 300WSM, like what the 6mmGrinch is to the 6mmPPC, maybe??