Post by picklehead on Oct 9, 2023 18:43:52 GMT -5
I'm 50/50 on the ease of flying well. Barnes will come straight out and say,, back bullet .50 off lands to get started. I have seen up to 1.25 off lands for things to come alive. First 45 bucks of my money was figuring this out and Barnes hadn't put that handy memo out then. Everyone was going straight to the hear say about Barnes and Berger needing to be .001 or so off lands , for accuracy. They even published this in a way. AND I believed it,, as many others. Never to my knowledge has Nosler or Sierra claimed such a thing or not in such a way. If you like the Nosler NBT other than it will blow up,, the Accubond is your answer. They are very forgiving on jump to lands and will go out on a limb and say this,,, If they won't fly fair with a decent powder and .025 off lands,, your rifle probably hates them and doubt it will. I'm basing this on a regular store bought rifle and not custom chamber.
We all or most know that a smooth pressure curve needs to take place on ignition to touching lands. If this doesn't happen, we create many problems and the one I want to harp on is,, erosion. When a normal pressure curve is met and perfect jump to lands,, throats and lead,, tend to last longer. If you start pushing hard copper bullets with more of a pressure spike and more room for the gasses to expand ,,, faster erosion. The super heated vapor needs to flow forward forward and sealed fast as possible.
Ever hear me say,, let them necks grow to the bottom of throat and only trim to get square? This helps a lot when shooting bullets like Barnes or some,, that end up needing a nice jump to be accurate. Flow generally goes forward, so let case length. Not way over specs but no need to trim some,, to min and besides,, them numbers don't know your chamber.
We all or most know that a smooth pressure curve needs to take place on ignition to touching lands. If this doesn't happen, we create many problems and the one I want to harp on is,, erosion. When a normal pressure curve is met and perfect jump to lands,, throats and lead,, tend to last longer. If you start pushing hard copper bullets with more of a pressure spike and more room for the gasses to expand ,,, faster erosion. The super heated vapor needs to flow forward forward and sealed fast as possible.
Ever hear me say,, let them necks grow to the bottom of throat and only trim to get square? This helps a lot when shooting bullets like Barnes or some,, that end up needing a nice jump to be accurate. Flow generally goes forward, so let case length. Not way over specs but no need to trim some,, to min and besides,, them numbers don't know your chamber.