I'f you did not have a rifle but had plenty of experience of shooting, what rifle/scope would you invest in to shoot a mile?
Honestly, if I didn’t have a rifle, I’d borrow one from a buddy or go to a class which offered rental or usage.
A “one mile rifle” is kinda like building a mini van for Funny Car Drag Racing. Guys do it, but it’s wasted money, because it can’t do anything else, and there isn’t really much use for that ONE thing it does pretty well. One mile falls into a category where typical LR rifles are “capable, but not ideal,” but it’s not yet into the realm of ELR… so a lot of LR guys all shoot our LR rifles to 1 mile, but it’s really farther than our rifles are meant to shoot, and assuredly all ELR guys shoot 1 mile, but it’s really SHORTER than their rifles are built to shoot…
If I were building with the commitment to waste that money on a one trick pony, I’d build a 30-32” straight contour 300 PRC.
All you need is a rifle which gets a 225-250 class bullet up over 2800fps, and I’d consider that about “ideal” for 1 mile shooting.
You can go buy a Ruger Precision Rifle or Savage in 338 Lapua, stick a Viper PST on top, zero, chrony, and hit a mile within your first box or two of ammo… whoohoo, now what? You could do the same with a 6.5 creed or 300wsm, or really, the same with a 243win or 6 creed - just might need a few more shots since you’re falling transonic earlier. Building a custom rifle in a 30 cal magnum makes the most sense - I’d go 300 PRC, as it’s a bit cheaper and has more options than 300 Norma or Rum, or 30 Nosler, or even a long throated, long barreled 300wm will nip right behind them… these hang with a 338 Lap…
But in the end, you have a rifle ideally suited for 1 mile, which burns way too much powder, costs too much, and recoils too much for conventional LR shooting disciplines, and then doesn’t have the horsepower even in Light class to hang with conventional ELR cartridges…
So personally, despite the fact that I shoot to a mile a couple times per year, for the better part of the last 2 decades, I wouldn’t recommend building/buying a 1 mile rifle - especially just to earn a novelty patch.