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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
300 Sherman Shortmag (SS)
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<blockquote data-quote="Idaho Trecker" data-source="post: 1227179" data-attributes="member: 67706"><p>I got the 300 SS back from Rhian with the new throat and the brake. It looks awesome with the brake and it is extremely tame now (not that it was bad at all before). I hurried and put the scope and stock back on last night and ran out to send a few fire forming loads down to smooth everything back out. After the fire forming loads I ran 3 of my most used load of 63.3 grains of Superformance down with the magneto attached. I was somewhat disappointed with the results until I started thinking about it and consulted with Rich. My fist shot gave me an error but next two were 2942 and 2953. Very good ES. This was the exact same speed as before and the bolt was super hard to get open, maybe more so than before. The case head has a very pronounced extractor mark and flattened primer. With a little collaborative brainstorming we hit on the idea of trying some new brass and see how that worked (the brass I used with the Superformance load was on its <span style="font-size: 22px">12<span style="font-size: 9px">th <span style="font-size: 10px">firing!!! All with full throttle loads. </span></span></span></p><p><span style="font-size: 22px"><span style="font-size: 9px"><span style="font-size: 10px"></span></span></span></p><p><span style="font-size: 22px"><span style="font-size: 9px"><span style="font-size: 10px">The results with the newly formed brass was just what we were expecting. Pressure dropped due to the brass being able to contract when sized and not spring back near the web. </span></span></span></p><p><span style="font-size: 22px"><span style="font-size: 9px"><span style="font-size: 10px"></span></span></span></p><p><span style="font-size: 22px"><span style="font-size: 9px"><span style="font-size: 10px">I'll post a picture of my results from this morning comparing the initial testing with the new throat. All loads except MRP were one shot over the magnetospeed. </span></span></span></p><p><span style="font-size: 22px"><span style="font-size: 9px"><span style="font-size: 10px"></span></span></span></p><p><span style="font-size: 22px"><span style="font-size: 9px"><span style="font-size: 10px">My next session out I will try a load of RL 17 and N560 to see how it compares to before the throating. I will also run higher with Hybrid 100V and see where I max out now. </span></span></span></p><p><span style="font-size: 22px"><span style="font-size: 9px"><span style="font-size: 10px"></span></span></span></p><p><span style="font-size: 22px"><span style="font-size: 9px"><span style="font-size: 10px">As of now I am leaning towards 100V, Superformance, or RL22-MRP being the winners. Out of those I'm hoping for 100V since it is the most temp stable of the powders I listed.</span></span></span></p><p><span style="font-size: 22px"><span style="font-size: 9px"><span style="font-size: 10px"></span></span></span></p><p><span style="font-size: 22px"><span style="font-size: 9px"><span style="font-size: 10px">Sorry for the long read but lots of information to get out there! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></span></span></span></p><p><span style="font-size: 22px"><span style="font-size: 9px"><span style="font-size: 10px"></span></span></span></p></blockquote><p></p>
[QUOTE="Idaho Trecker, post: 1227179, member: 67706"] I got the 300 SS back from Rhian with the new throat and the brake. It looks awesome with the brake and it is extremely tame now (not that it was bad at all before). I hurried and put the scope and stock back on last night and ran out to send a few fire forming loads down to smooth everything back out. After the fire forming loads I ran 3 of my most used load of 63.3 grains of Superformance down with the magneto attached. I was somewhat disappointed with the results until I started thinking about it and consulted with Rich. My fist shot gave me an error but next two were 2942 and 2953. Very good ES. This was the exact same speed as before and the bolt was super hard to get open, maybe more so than before. The case head has a very pronounced extractor mark and flattened primer. With a little collaborative brainstorming we hit on the idea of trying some new brass and see how that worked (the brass I used with the Superformance load was on its [SIZE=6]12[SIZE=1]th [SIZE=2]firing!!! All with full throttle loads. The results with the newly formed brass was just what we were expecting. Pressure dropped due to the brass being able to contract when sized and not spring back near the web. I'll post a picture of my results from this morning comparing the initial testing with the new throat. All loads except MRP were one shot over the magnetospeed. My next session out I will try a load of RL 17 and N560 to see how it compares to before the throating. I will also run higher with Hybrid 100V and see where I max out now. As of now I am leaning towards 100V, Superformance, or RL22-MRP being the winners. Out of those I'm hoping for 100V since it is the most temp stable of the powders I listed. Sorry for the long read but lots of information to get out there! :) [/SIZE][/SIZE][/SIZE] [/QUOTE]
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300 Sherman Shortmag (SS)
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