Thread: groups gone to the dogs

iv put 2 boxes through my new 7mm rem mag, now im finding my groups are going to the dogs, started about 2 inches at 100m, now im lucky to keep it on the paper.... its getting a bit disheartening that my new rifle wont shoot now. i started by shooting and cleaning every shot to avoid fouling, but is this the main reason my groups are getting worse? iv shot my other rifles and havent had any issues like this.