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Extreme Long Range Hunting & Shooting (ELR)
how do you measure barrel temperature in a reliable manner?
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<blockquote data-quote="Professor Doolittle" data-source="post: 2280031" data-attributes="member: 118902"><p>Well I should have put more background into my initial post. The whole issue started with load ladder development, that in the process of shooting 60 rounds the barrel temp is climbing. I've read that pros will shoot five to ten rounds then come back to a cooled state but they never describe how they satisfy what it means to return to the original state. My sh(t show cost me $3K because first I paid $300 for a load ladder which I shot and ordered the load from my best group which was .36MOA on five shots. Spent $2700 on 500 rounds with that recipe, only the day I receive it discovered the muzzle brake had been loose while I shot the load ladder. To top that off we shot with both labradar and magnetospeed mounted via chassis with the new rounds only to discover the muzzle velocity of everything, new bullets and old control groups, had increased by 40fps because the barrel had not finished breaking in, I only had around 150 rounds out of it when I ordered the reloads. So what do I have? Barrel temperature shifting muzzle velocity, barrel wear shifting muzzle velocity. I'm ready to buy applied ballistics software package for $200. Like the gentleman said before, if you don't know what error you're chasing don't f*(k with it. The only good news is the reloads are shooting at a standard deviation of 8.5fps, that's smoking good. Berger bullets stock was very close to that, though, 10.2fps. Berger seems to be an amazing company.</p></blockquote><p></p>
[QUOTE="Professor Doolittle, post: 2280031, member: 118902"] Well I should have put more background into my initial post. The whole issue started with load ladder development, that in the process of shooting 60 rounds the barrel temp is climbing. I've read that pros will shoot five to ten rounds then come back to a cooled state but they never describe how they satisfy what it means to return to the original state. My sh(t show cost me $3K because first I paid $300 for a load ladder which I shot and ordered the load from my best group which was .36MOA on five shots. Spent $2700 on 500 rounds with that recipe, only the day I receive it discovered the muzzle brake had been loose while I shot the load ladder. To top that off we shot with both labradar and magnetospeed mounted via chassis with the new rounds only to discover the muzzle velocity of everything, new bullets and old control groups, had increased by 40fps because the barrel had not finished breaking in, I only had around 150 rounds out of it when I ordered the reloads. So what do I have? Barrel temperature shifting muzzle velocity, barrel wear shifting muzzle velocity. I'm ready to buy applied ballistics software package for $200. Like the gentleman said before, if you don't know what error you're chasing don't f*(k with it. The only good news is the reloads are shooting at a standard deviation of 8.5fps, that's smoking good. Berger bullets stock was very close to that, though, 10.2fps. Berger seems to be an amazing company. [/QUOTE]
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how do you measure barrel temperature in a reliable manner?
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