I have a winchester model 70 wsm short action. Hoping to make it in to a long range hunting 7mm wsm. I am wanting to use this as a repeater with 180gr vlds. Is there any box mags or detachable box mags I can use with a model 70 short action so I can seat those long bullets out to optimum length? I would rather just have a box mag but would take any that would work. I see alot of things out there for SA 700s but not much for winchester. Thanks for any info on this or any info on 7mm wsm builds would be appreciated.