MontanaRifleman
Well-Known Member
Thanks for the response AJ, I respect and appreciate your expertise.
There sure are a lot of opinions on this subejct. The article was interesting, btu I dont measure case head expansion to determine excessive pressure. I figure all it gives is a very relative idea of pressure and cant actually and precisely measure excessive pressure.
I also realize that there are variables in the visual signs as you have mentioned, so I guess my perspective is... that if my brass is not being damaged and my bolt lifts reasonably well and there appears to be no potential damage to the rifle, then "all is well". I think chrony velocity can be another backup tool, but I have persoanally experienced on a couple of occasions where I got a very stiff bolt with extractor marks and very flat primers that showed a lower chrony velocity than the 1/2 gr lower increment fired just before that showed no extractor marks or stiff bolt, etc.
There seems to be a lot of voodoo and black magic in this game, but in my experience, if one is attentive to detail, one can get a good feel for what is going on.
I still think there are too many variables in looking at velocity, not the least of which is the difference from one chrony to another, and not to mention the differenc from one rifle to another shooting the same load.
I can understand your view and I sure dont discount your experience and knowledge which is greater than mine.
Thanks again for all the interesting info and your contribution. I will keep it in the grey matter data base
Mark
There sure are a lot of opinions on this subejct. The article was interesting, btu I dont measure case head expansion to determine excessive pressure. I figure all it gives is a very relative idea of pressure and cant actually and precisely measure excessive pressure.
I also realize that there are variables in the visual signs as you have mentioned, so I guess my perspective is... that if my brass is not being damaged and my bolt lifts reasonably well and there appears to be no potential damage to the rifle, then "all is well". I think chrony velocity can be another backup tool, but I have persoanally experienced on a couple of occasions where I got a very stiff bolt with extractor marks and very flat primers that showed a lower chrony velocity than the 1/2 gr lower increment fired just before that showed no extractor marks or stiff bolt, etc.
There seems to be a lot of voodoo and black magic in this game, but in my experience, if one is attentive to detail, one can get a good feel for what is going on.
I still think there are too many variables in looking at velocity, not the least of which is the difference from one chrony to another, and not to mention the differenc from one rifle to another shooting the same load.
I can understand your view and I sure dont discount your experience and knowledge which is greater than mine.
Thanks again for all the interesting info and your contribution. I will keep it in the grey matter data base
Mark