I Have a sporterized Arisaka type 99 that I would like to develop some ammo for. Before you get too upset over someone sporterizing a WWII rifle, know that it was done in the late 1940s after my grandfather returned from the pacific theater. It shoots great! Onto my question, how much does reforming .30-06 into 7.7mm Jap effect accuracy? Obviously, using good brass to start with is a given. Thanks in advance for your replies!