Re: 30-06, 208AMax, RL17
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bohem</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Sapper06</div><div class="ubbcode-body">I am only relating the data from multiple barrels on a SAAMI conformal pressure transducer set-up.
Blown primers/cratered primers/ejector marks are not always pressure signs. NO I would not keep loading hotter if I saw these signs, but they are not always over pressure signs. By overpressure I mean any load where the maximum average pressure exceeds SAAMI specs.
I also agree that all rifles are different,but most shoot within a range that we all can agree will provide similiar results, hence why loading manuals work and we all share data.
My personal -06 flattens primers at 62 grains with 180s and at 59 grains with 200s, but they are not overpressure.
Merry Christmas to all
</div></div>
I guess it's the 48ksi that makes me wonder more than anything, it also seems somewhat dangerous to advise people that they can't sneeze cases with 200gr bullets in a 30-06 and RL22. </div></div>
Like I said, a blown primer does not mean overpressure! I have not advised anyone to keep stuffing powder in a case until it blows... I said, it is damn near impossible to reach 60 KSI in an 06 case with RL 22. Can you do it if you try real real hard; yes you can. I am not talking out my butt on this either... I have the priveledge of looking at this data every stinking day. I have the proffesional equipment that tells me what is overpressure and what is not. I can measure a firing pin hole and find that it is larger than I like to see them and know that my blown primer is due to a rifle problem and not from exceeding SAAMI maximum average pressure! I can also hardness test brass and find out where it lies on the scale and this tells me a whole lot about case stretch, extractor marks from gas guns, and ejector marks.
Headspace only tells a little bit of the story. Not only do we have to worry about how long a case is compared to the chamber, but we also have to worry about how fat the case is compared to the chamber. Additionally, how flat is the case compared to the bolt face. If either are concave or convex by just a few thou, you can wind up with problems.
Why is it that we are willing to believe testimonials, but not hard data?
Bohem, I do not know your resume, just like you do not know mine. I read your post and evaluate what is said and test what is presented befoe I make a final determination. Please extend me the same courtesy. If you have all the required gauging and equipment to test this stuff, then please present objective statistical data.
thanks,
Mike
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bohem</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Sapper06</div><div class="ubbcode-body">I am only relating the data from multiple barrels on a SAAMI conformal pressure transducer set-up.
Blown primers/cratered primers/ejector marks are not always pressure signs. NO I would not keep loading hotter if I saw these signs, but they are not always over pressure signs. By overpressure I mean any load where the maximum average pressure exceeds SAAMI specs.
I also agree that all rifles are different,but most shoot within a range that we all can agree will provide similiar results, hence why loading manuals work and we all share data.
My personal -06 flattens primers at 62 grains with 180s and at 59 grains with 200s, but they are not overpressure.
Merry Christmas to all
</div></div>
I guess it's the 48ksi that makes me wonder more than anything, it also seems somewhat dangerous to advise people that they can't sneeze cases with 200gr bullets in a 30-06 and RL22. </div></div>
Like I said, a blown primer does not mean overpressure! I have not advised anyone to keep stuffing powder in a case until it blows... I said, it is damn near impossible to reach 60 KSI in an 06 case with RL 22. Can you do it if you try real real hard; yes you can. I am not talking out my butt on this either... I have the priveledge of looking at this data every stinking day. I have the proffesional equipment that tells me what is overpressure and what is not. I can measure a firing pin hole and find that it is larger than I like to see them and know that my blown primer is due to a rifle problem and not from exceeding SAAMI maximum average pressure! I can also hardness test brass and find out where it lies on the scale and this tells me a whole lot about case stretch, extractor marks from gas guns, and ejector marks.
Headspace only tells a little bit of the story. Not only do we have to worry about how long a case is compared to the chamber, but we also have to worry about how fat the case is compared to the chamber. Additionally, how flat is the case compared to the bolt face. If either are concave or convex by just a few thou, you can wind up with problems.
Why is it that we are willing to believe testimonials, but not hard data?
Bohem, I do not know your resume, just like you do not know mine. I read your post and evaluate what is said and test what is presented befoe I make a final determination. Please extend me the same courtesy. If you have all the required gauging and equipment to test this stuff, then please present objective statistical data.
thanks,
Mike