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Long Range Hunting & Shooting
1st Range Day with SAUM
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<blockquote data-quote="Okanogan" data-source="post: 1907442" data-attributes="member: 90397"><p>Still working load development myself with the GAP 6.5 SAUM. I have made it up to 60.8 g H1000 with 140 EH with no pressure signs. Going up in 0.2 grain increments sounds pretty safe and it will be nice to get some additional rounds down your new barrel.</p><p></p><p>My group sizes for the 156 EH started opening up as I went up in velocity above 2950ish. I have a 2B contour and have seen other lighter barrel rifles start opening up group size as well past a sweet spot. Using RL26, I just started showing the slight signs of primer flattening at 59 grains with the 156 EH. I'm back down to just below 58 grains as it shoots better.</p><p></p><p>I won't worry too much about velocity as you are initially breaking in the barrel. Mine looks to have sped up somewhere between 50-75 fps when I passed the 150 round mark. The increase in speed has caused me to go back and decrease some promising looking charge weights slightly.</p></blockquote><p></p>
[QUOTE="Okanogan, post: 1907442, member: 90397"] Still working load development myself with the GAP 6.5 SAUM. I have made it up to 60.8 g H1000 with 140 EH with no pressure signs. Going up in 0.2 grain increments sounds pretty safe and it will be nice to get some additional rounds down your new barrel. My group sizes for the 156 EH started opening up as I went up in velocity above 2950ish. I have a 2B contour and have seen other lighter barrel rifles start opening up group size as well past a sweet spot. Using RL26, I just started showing the slight signs of primer flattening at 59 grains with the 156 EH. I'm back down to just below 58 grains as it shoots better. I won't worry too much about velocity as you are initially breaking in the barrel. Mine looks to have sped up somewhere between 50-75 fps when I passed the 150 round mark. The increase in speed has caused me to go back and decrease some promising looking charge weights slightly. [/QUOTE]
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