Fitch, That is a good point about not spending the money when it is not neccesary.
Back in the 60's and 70's we had to wildcat cartridges and use expensive custom barrels to get the performance and accuracy we wanted for long range hunting. We had few choices from manufacturers who all offered the same standard limited cartridge line up in the same basic rifles for the basic 300 yard long range shot. In the mid to late 90's that all started to change as more long range cartridges began to be offered and good accurate rifles available to shoot them in.
Now it is no problem finding an over the counter rifle easily capable of 800 yard kills in the $500-$750 range. Very limited bedding and trigger work is all that is required. Unless you are really just wanting to spend some money these rifles will serve you well. The cartridges you are discussing here are marginal to 800 yards anyway on anything larger than deer when there are so many other good cartridges available that will get you well beyond 800 on larger game. If you are considering elk drop that to 500 yards with some of these little 7's discussed. And that is only if you are using the best premium hunting bullets on the market and waiting for that perfect shot. I don't like to be limited. Shots on trophy animals are just to hard to come by to be limited. So my point is within the range you are looking that suit the cartridges you are looking at you can save some money and get a good over the counter rifle.
If you are serious about shooting long range beyond 800 yards regularly and out to over 1000 yards then spend your extra money on a nice long range rifle chambered in a cartridge capable of killing big game animals efficiently at long range. These little 7's are not the ones. I didn't learn what I say sitting and reading on a computer. I learned through doing it for 40 years and seeing hundreds of animals shot.
The little short mags and 7mm remington can not drive a 180 grain bullet fast enough to gain anything within the effective range of the cartridges considering big game hunting. They are actually a detriment. Within the best effective range of these cartridge for most big game hunting these little 7's are best served with a lighter premium hunting bullet that will do the job in all hunting situations. Why load a cartridge with a bullet great on targets to well over 1000 yards when the cartridge is not a good choice on large big game beyond a few hundred yards. Use some logic here. As I read over these forums I see many people putting to much emphasis on theoretical ballistic charts and gurus on those instead of listening to people with years of long range hunting experience seeing hundreds of animals shot.
If you think you want to use a 7mm for long range hunting then do not include elk size game in the equation unless your long range is under 600 or so yards. Increase that a little if you consider starting around the 7mm STW, 7mm-300 Weatherby, 7mm RUM, 7mm Allen, 7mm SIN or something like that with enough power to send the heavy, high BC 7mm bullets downrange with authority.
If your hunting is only deer, antelope and caribou type hunting then the 7's can be fun to shoot game at 1000 or so yards considering it is a big 7. Sorry I got carried away but I just see way to many elk size animals lost each year to the 7's and I try all I can to caution people against using them. If you are hunting game less than elk then have fun with it.