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The Range
Rifle & Shotgun Discussion
Tikka T3 260 Load Dev
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<blockquote data-quote="slas" data-source="post: 2965112" data-attributes="member: 39669"><p>Broke the new Tikka Forest in last week so this week started some load development and brought out the chrony. I've only been reloading a year so I still have plenty to learn and would really like some input from those of you out there doing 260 load development. I decided to try some 130 grain Berger VLD hunting bullets this time around. First issue I ran into was that distance to the lands with this long bullet was 2.980. The 260 stock is short action, due to bolt throw, with a max length on the magazine of 2.82. I decided to go ahead and do a bolt modification for the longer OAL since I reload and knew I was going to need it. I followed the instructions on youtube here: [MEDIA=youtube]e4rCsOohVks[/MEDIA] and fortunately didn't screw anything up. I then ordered an extended magazine for the T3 long action cartridges and was good to go after that. The feed is a little tricky, I just need to move a little slower on the cycle.</p><p></p><p>Last night I worked up some loads with three powders, IMR 4350, Varget and IMR 4451 (said the best replacement for H4350, since I couldn't find any). I did a little work last week with some 120 Sierra Pro Hunters so I had an idea where I wanted to start on loads. I didn't chrony any last week since I was mainly breaking in. Here were today loads and speeds averaged over five shot groups with the 130 VLD's:</p><p></p><p>IMR 4451</p><p>41g - 2541 </p><p>41.5g - 2581 </p><p>42g - 2585</p><p></p><p>Varget</p><p>36g - 2556</p><p>36.5g - 2606</p><p>37g - 2653</p><p></p><p>IMR 4350</p><p>42g - 2621</p><p>42.5g - 2621</p><p></p><p>The OAL was set to 2.960 with a few groups set at 2.965. My research on the web showed most had success .015 to .020 off the lands. All the above speeds are considered low so I'll need to work up while checking for any pressure signs. Had none today. Groups were fair with the IMR 4451 showing good accuracy albeit the slow speed.</p><p></p><p>The worst part shooting today was the wind gusting and watching my cross-hairs blow about. But then again, any day you can go shooting is a good day.</p><p></p><p>[ATTACH=full]97862[/ATTACH] [ATTACH=full]97863[/ATTACH]</p><p></p><p>[ATTACH=full]97861[/ATTACH]</p></blockquote><p></p>
[QUOTE="slas, post: 2965112, member: 39669"] Broke the new Tikka Forest in last week so this week started some load development and brought out the chrony. I've only been reloading a year so I still have plenty to learn and would really like some input from those of you out there doing 260 load development. I decided to try some 130 grain Berger VLD hunting bullets this time around. First issue I ran into was that distance to the lands with this long bullet was 2.980. The 260 stock is short action, due to bolt throw, with a max length on the magazine of 2.82. I decided to go ahead and do a bolt modification for the longer OAL since I reload and knew I was going to need it. I followed the instructions on youtube here: [MEDIA=youtube]e4rCsOohVks[/MEDIA] and fortunately didn't screw anything up. I then ordered an extended magazine for the T3 long action cartridges and was good to go after that. The feed is a little tricky, I just need to move a little slower on the cycle. Last night I worked up some loads with three powders, IMR 4350, Varget and IMR 4451 (said the best replacement for H4350, since I couldn't find any). I did a little work last week with some 120 Sierra Pro Hunters so I had an idea where I wanted to start on loads. I didn't chrony any last week since I was mainly breaking in. Here were today loads and speeds averaged over five shot groups with the 130 VLD's: IMR 4451 41g - 2541 41.5g - 2581 42g - 2585 Varget 36g - 2556 36.5g - 2606 37g - 2653 IMR 4350 42g - 2621 42.5g - 2621 The OAL was set to 2.960 with a few groups set at 2.965. My research on the web showed most had success .015 to .020 off the lands. All the above speeds are considered low so I'll need to work up while checking for any pressure signs. Had none today. Groups were fair with the IMR 4451 showing good accuracy albeit the slow speed. The worst part shooting today was the wind gusting and watching my cross-hairs blow about. But then again, any day you can go shooting is a good day. [ATTACH=full]97862[/ATTACH] [ATTACH=full]97863[/ATTACH] [ATTACH=full]97861[/ATTACH] [/QUOTE]
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