If you meant the non magnum 7MM as in 7MM Mauser…AKA 7X57 Mauser… That is an awesome cartridge that is very close to the 7MM-08 ballistically, with more case capacity for handloaders. It is a popular custom rifle caliber that (sadly) is only made in a few rifles comercially today. Ruger still makes it in a #1 single shot and possibly the Mannlicher bolt action.
I have a 7mm-08 remington youth short barrel very light would not trade it for the anything. A 300 yards it will shot a 1 inch group on the fourth shot about 5 inches
Unfortnatly its not me pulling the tigger, its my uncle that shoots about everyday and reloads his own shells.I personally would have a 20 inch pattern. He told me its probably one of the most accurate guns he has ever shot.