timothy Posted August 7, 2022 Share Posted August 7, 2022 Hi, I bought a 38 super STI Trubor (5" barrel open gun with T2 style Compensator; no popple holes) from the original owner earlier this year. It's my first open gun. I have owned an SVI limited 40 that I have reloaded for the past 20 years. In my quest for the right load recipe for the Trubor I looked thru posts on this forum as well as the Jeff Maas .38 Super IPSC Loads List. I tried many different bullet type/weight vs Powder charge (all HS6 given that this is popular for compensated guns and readily available) to get something that works for that gun, meaning is accurate and minimizes muzzle flip. For reference I have attached PDF of notes, which reflects some of my testing. So I arrived at the following for a load recipe: Zero 115 JHP .355 Dia, Hodgdon HS6 9.5gn, COL 1.246 This provides a velocity of about 1550FPS which works out to a Power Factor of 178. I was speaking with a shooting friend today who owns several open guns and he feels that with this recipe/178 PF I am taking a significant chance of cracking the slide within a few years and I should reduce the load. So here's my question, I am interested to hear any constructive feedback on whether this is likely to happen. I'm reluctant to alter this load absent additional compelling data/input. My sense is that this gun/comp combination requires a high volume of powder to work the comp and my own testing indicates less accuracy/consistency with a smaller powder charge. I also have the impression (from above cited sources) that although 178 is obviously > 165, that it's not out of the stratosphere. Of course I could be wrong and need to keep an open mind. Hence this post. I'm particularly interested to hear from others with the same or similar gun. Chronodata STI Trubor 38 Super 20220507 and accuracy notes.pdf Quote Link to comment Share on other sites More sharing options...
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