What you need to do is get a set of sling swivel studs designed EXACTLY for your rifle. They will fit perfectly. It sounds like you've been buying swivel stud set for rimfire rifle with tubular magazine-that's why they're not big enough. To get them installed perfectly, and without being offcentered or scratching anything, take it to your local gunsmith. The front sling stud will fit right on when the correct 1 is chosen for YOUR rifle, but the rear will have to be drilled into the stock and it's darn easy to get them crooked unless you know what you're doing.