I am loading 300wm in a M70 and using a Hornady COAL gauge the lands are at 2.880ish. Doing all the math the bullets are still too long for the magazine. The longest I can get is 2.699. This is using the Hornady bullet comparator not a true COAL. What would be the best option for trying to tweak the best accuracy out of this gun? Powder? COAL? Crimp? Modify the magazine box(Not Likely)?