Here's the numbers for my sons bone stock(minus threaded for a muzzle brake) rem 700LR in 300rum...bone stock 26" barrel, bone stock factory chamber, loading the wimpy 230 berger target hybrid with a G1/G7 of .717/.374........At the muzzle it does 3155fps..@500 yards it is -33.2" @2531fps with the 230 berger....My 28" Bartlein chambered for the 230 Berger does a bit better..3220fps with the same 230 berger...I could care less what anyone shoots, but there's no reason for anyone to be making claims that aren't close to what real world reality actually is...Now I am sure the prc will get better barrel life, but I doubt it comes anywhere close to what a 300win mag does, in fact I bet it barely betters the rum...
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Here is the SAAMI drawings for both cartridges...he claims the prc is a far better designed case...show me the design changes that make it drastically better..a very slight lessening of the taper isn't the end all of bullet design....

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You posted .300 RUM numbers that practically duplicate what I posted for the .300 PRC, yet you maintain that his claim that the PRC is in the same league as the RUM is absurd ("nowhere near reality.")

I do agree that his claim that the .300 RUM and .300 WM are 'old news' was pretty off the mark.
But I don't see where: "he claims the prc is a far better designed case" in this thread.  Maybe he deleted it before you could quote it?

Not sure how, but yeah he posted a bit more than what currently shows...no big deal...Now for the prs versus rum deal... the rum data I posted is using the lower BC of the berger...717 versus .777 of the hornaday, go look at common  hand loads for both, prc is pretty consistent at around 2800-2900 fps for a 225-230 round, 300rum is pretty consistent at 3050-3150 fps for the same bullets.......load both rifles with the same bullet and the rum will consistently run 250-350 plus fps faster...So yes, load the same bullet in both and the rum will consistently run 250 fps or more faster/flatter/further than the prc..

I agree that the RUM is probably a somewhat better 1-mile cartridge (by the numbers.)  But both are very capable long-range cartridges.  That's all I'm saying.

Not to get to Far off topic but how does your son like that 700LR in 300 RUM i've really been thinking about getting one after the first of the year as an intro to ELR for hunting.  If you Dont want to muddy up this thread with an answer IM me

And I agree with you 100% both are damn fine cartridges, both are perfectly good for using in LR shooting..

In our group, we have bought 5 different rem-700 LR's over the last few years...2 in 30-06, 1 in 300wm and 2 in 300rum, everyone of them have been perfect, all shoot sub 1", best is a Buddys rum, it shoots sub 1/2", the sons rum shoots sub 3/4"...Both rum's have been threaded and brakes installed.....The only issue I can complain about at all is one of the 30-06 showed a couple rust spots on the finish after a very wet trip 2 seasons ago...Not sure if it was the finish or if it got nicked..but it cleaned right up with some clp and steel wool...Would not hesitate to buy more of the LR's..especially when they often go on sale for just over 600 bucks...

Well that's reassuring that mine will probably be great too

One of my sons is playing at 1600yds with a  28 Nosler, 90gr. Berger, I think. Very consistent so far. Not sure of the size of the target but using plates.

6.5 creedmoor, 300 win mag, 338 norma mag, 338 lapua, 375 cheytac, 408 cheytac, 50bmg.

I've done it with my 308.  It's farrrrr from ideal.

Friend of mine won a big ELR match shooting a 6.5 SAUM with 153 Hornady A-Tips against a field of 338s and 408s.

ETA- If I were to build a rig to compete out to 1 mile I'd build a 300 Norma chambered for 250 grain A-Tips.

Ditto on .338 LAP

300 mag is still a 30 cal bullet. Not the worst, but def not the best. It'll get there, but it's a lot more work to hit and repeat. 6.5 peters out (even hot) around 1300 yards, .308 a good deal in from that and you've got a lot of variables to ride out that far with small and slow(er). I'm also at 1400 elevation up here.

Click...wait 5-6 seconds, dink. That's a haul.

Our range is 1460 (so not technically a 1 mile shot like OP asked)....very accurate dope still has the .338 supersonic for a good ways past a mile, but scope won't climb that high without help even on a 40 moa base...(TAKE NOTES SONNY!!! It's an expensive lesson!) but after finding the load my gunny likes, 90g of h-1000 pushing a 270 eld,  it's almost easy. I'm sure pushing it 1 mile or over would present more of a challenge but for me the .338 eats it up.

That's me steel gonging a 2x2 at 1460 with a factory savage 110 ba (on the cheap) topped with a pst 24x 2fp. Hilltop to hilltop. Pics on request.

For the some of us:

My uncle, who's got it like that, is holding .5 moa GROUPS with his 6.5 sweed, but I bet he's got 4x the amount of money in it with all the reloading stuff alone. His bullet will damn near fall out, and he has to single hand load they're sticking out so far and it's a barrel SCORCHER. But, everyone has their own end game.

For me, I just wanted to hit what I was aiming at....right tool for the job is often the most obvious.

If I find a line 1 mile + I'll be hitting up barrett for a .416