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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
270 Sherman Shortmag (SS)
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<blockquote data-quote="Idaho Trecker" data-source="post: 1158090" data-attributes="member: 67706"><p>Finally made it out a couple times to play with the 170's with my SS. </p><p></p><p>The first outing I loaded 3 groups of 3 with the same lighter charge of rl 26 and just test seating depth to see what my rifle liked. Here is what I ended up with:</p><p></p><p>27.41 inHg 35 Degrees</p><p></p><p>3.037" 2.982" 2.927"</p><p>2810 2824 2818</p><p>2812 2835 2814</p><p>2845 2829 2812</p><p></p><p>The lengths are OAL. My rilfe grouped best with the mid length load which was .057" off the lands. </p><p></p><p>On a bright note I finally did bite the bullet and got a Magnetospeed so I have some piece of mind with my speeds. </p><p></p><p>The next day I went out and ran a quick pressure test with the 170's and the mid seating depth. I just fired one shot at each charge of 62,63, and 64 grains to see where I topped out. Here is what I got:</p><p></p><p>62..... 2964</p><p>63..... 3018</p><p>64..... 3103</p><p></p><p>After firing these my practical max is going to be around 62 grains of RL 26. </p><p>63 grains was stiff bolt lift and 64 almost needed a stick to slam the bolt open.</p><p>The 62 and 63 grain load were practically the same hole at 100 yards.</p></blockquote><p></p>
[QUOTE="Idaho Trecker, post: 1158090, member: 67706"] Finally made it out a couple times to play with the 170's with my SS. The first outing I loaded 3 groups of 3 with the same lighter charge of rl 26 and just test seating depth to see what my rifle liked. Here is what I ended up with: 27.41 inHg 35 Degrees 3.037" 2.982" 2.927" 2810 2824 2818 2812 2835 2814 2845 2829 2812 The lengths are OAL. My rilfe grouped best with the mid length load which was .057" off the lands. On a bright note I finally did bite the bullet and got a Magnetospeed so I have some piece of mind with my speeds. The next day I went out and ran a quick pressure test with the 170's and the mid seating depth. I just fired one shot at each charge of 62,63, and 64 grains to see where I topped out. Here is what I got: 62..... 2964 63..... 3018 64..... 3103 After firing these my practical max is going to be around 62 grains of RL 26. 63 grains was stiff bolt lift and 64 almost needed a stick to slam the bolt open. The 62 and 63 grain load were practically the same hole at 100 yards. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
270 Sherman Shortmag (SS)
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