Accuracy Factors

[Adam Helmer]

royinidaho,

Why did you vote for the case? Later in your post you advised about powder: "is adjusted until best groups are achieved." Isn't the proper "accuracy" powder charge the key accuracy factor here?

My Match Garand loves 49.5 grains of IMR4895 and a 150 Hornady spitzer bullet. I can use the same case, primer and bullet and put in 10 or 15 grains of IMR4895 and the results would be nil. Walla, the proper powder charge gets me to the X-ring with the same case, primer and bullet. What is the accuracy factor here? The proper powder charge, of course. The cartridge case is not a key factor in my opinion if you do not get the projectile to the proper velocity.

Adam