bemanuel Posted May 29, 2019 Share Posted May 29, 2019 Been loading 135 gr blue bullets using 3.35 gr Cleanshot at 1.135”. Getting ~128 PF out of a CZ P10F. It appears (based upon chrono data) as if the PF drops as the ambient temperature (temp of bullet) increases. Anyone else experience this? Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
ManOnTarget Posted May 29, 2019 Share Posted May 29, 2019 Yep, it's a thing. http://firearmshistory.blogspot.com/2012/11/the-effect-of-temperature-on-ammunition.html Link to comment Share on other sites More sharing options...
bemanuel Posted May 29, 2019 Author Share Posted May 29, 2019 Yep, it's a thing. http://firearmshistory.blogspot.com/2012/11/the-effect-of-temperature-on-ammunition.htmlThanks for the response. I can understand how lower temps will decrease velocity of bullet. However velocity appears to drop as temperature increases when using Cleanshot. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
OPENB Posted May 29, 2019 Share Posted May 29, 2019 It’s called reverse temperature sensitivity. Some powders exhibit it. Link to comment Share on other sites More sharing options...
ManOnTarget Posted May 29, 2019 Share Posted May 29, 2019 2 minutes ago, bemanuel said: Thanks for the response. I can understand how lower temps will decrease velocity of bullet. However velocity appears to drop as temperature increases when using Cleanshot. Sent from my iPhone using Tapatalk Sorry! I must have missread your post. Interesting. I have no intuition as to why that would be occurring. I have only noticed velocity increase with temperature, but I only use Titegroup. I will ask around at my club and see if anyone uses cleanshot. Link to comment Share on other sites More sharing options...
4n2t0 Posted May 29, 2019 Share Posted May 29, 2019 1 hour ago, OPENB said: It’s called reverse temperature sensitivity. Some powders exhibit it. This. Link to comment Share on other sites More sharing options...
Shmella Posted May 29, 2019 Share Posted May 29, 2019 i think we all know what it is. Anyone experience it with Clean shot is the question. Link to comment Share on other sites More sharing options...
4n2t0 Posted May 30, 2019 Share Posted May 30, 2019 On 5/29/2019 at 11:45 AM, Shmella said: i think we all know what it is. Anyone experience it with Clean shot is the question. The OP experienced it, lol. Link to comment Share on other sites More sharing options...
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