I believe the rule of thumb i use is at least the calibres length of bullet in the neck ( i try depending on the bullet not to count the boattail depending on the bullet). So At least 7mm of bullet in the neck of the cartridge with those burgers VLD's there nice and long like a missile, as with most larger 7mm bullets which is nice, usually means more length of bullet from the ogive to play with.
In my experience (.223 only with this problem) when the bullet isn't seated enough in the neck you get case neck tarring/stretching and increased pressure signes (flatter primers). Probably not going to ruin his gun but it can wreck brass really quickly arrrgh and typically pressure signs are bad and can be harder on the rifle bolt face ect
Last edited by 500+BC; 02-18-2017 at 07:32 PM.
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