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Rifles, Reloading, Optics, Equipment
Reloading
300 Win Mag??? Weird Shooting Chrony Master F1 8.8:8.8 reading
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<blockquote data-quote="bluedog69" data-source="post: 2218143" data-attributes="member: 118823"><p>So just took a few shots with buddies 300 Win Mag. Factory Winchester 180's</p><p>gave about a 3010 average. (2 shots 3001 and 3022)</p><p></p><p>My handloads with Sierra 180 SBT gamekings, 72 gr of H4831, CCI LRM primer, COL 3.360 to fit in Mag(NEVER found lands even with bullet barely in case) gave a </p><p>readings of 2752, 2732, 2756 and 2798.</p><p></p><p>Shots were in this order 2752, 2732, 2756 handloads </p><p>then 2 factories 3001, 3022, </p><p>then handload 2798.</p><p></p><p>It is 90 degrees out and we were in the sun. Took gun and shells out of AC house and shot off deck.</p><p></p><p>QUESTION 1) Will this extreme heat(sun) raise FPS as the gun and shells get warmed up in the sun?</p><p></p><p>QUESTION 2) The last two shots 3022 factory and 2798 hand load the chrony screen displayed 8.8:8.8.</p><p> I shut it off and just for a split second it said 3022 then shut off? Then I took the handload</p><p> shot and 8.8:8.8 again. Shut it off and it read 2798 for about 1 second then shut off?</p><p> Anyone ever seen this displayed? 8.8:8.8? Chrony in sun getting too hot? All I have ever seen</p><p> in low light is err1 and err2 readings.</p><p></p><p></p><p>So far I am not very happy. 2" four shot factory ammo group and the same with my handloads. This is a new </p><p>TC Venture with a 4-16x44 Diamond back tacticial FFP Vortex. Gonna try cleaning it good.</p><p></p><p>QUESTION 3) Should I jump to 73 gr of H4831? No pressure signs, no sticky bolt lift etc. Was kind shocked to see</p><p>2750 ish on handloads and 3010 ish on factory El Cheepo Win ammo. 270 FPS difference on first 3 handloads and factory shots.</p><p></p><p>Any suggestions?</p></blockquote><p></p>
[QUOTE="bluedog69, post: 2218143, member: 118823"] So just took a few shots with buddies 300 Win Mag. Factory Winchester 180's gave about a 3010 average. (2 shots 3001 and 3022) My handloads with Sierra 180 SBT gamekings, 72 gr of H4831, CCI LRM primer, COL 3.360 to fit in Mag(NEVER found lands even with bullet barely in case) gave a readings of 2752, 2732, 2756 and 2798. Shots were in this order 2752, 2732, 2756 handloads then 2 factories 3001, 3022, then handload 2798. It is 90 degrees out and we were in the sun. Took gun and shells out of AC house and shot off deck. QUESTION 1) Will this extreme heat(sun) raise FPS as the gun and shells get warmed up in the sun? QUESTION 2) The last two shots 3022 factory and 2798 hand load the chrony screen displayed 8.8:8.8. I shut it off and just for a split second it said 3022 then shut off? Then I took the handload shot and 8.8:8.8 again. Shut it off and it read 2798 for about 1 second then shut off? Anyone ever seen this displayed? 8.8:8.8? Chrony in sun getting too hot? All I have ever seen in low light is err1 and err2 readings. So far I am not very happy. 2" four shot factory ammo group and the same with my handloads. This is a new TC Venture with a 4-16x44 Diamond back tacticial FFP Vortex. Gonna try cleaning it good. QUESTION 3) Should I jump to 73 gr of H4831? No pressure signs, no sticky bolt lift etc. Was kind shocked to see 2750 ish on handloads and 3010 ish on factory El Cheepo Win ammo. 270 FPS difference on first 3 handloads and factory shots. Any suggestions? [/QUOTE]
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300 Win Mag??? Weird Shooting Chrony Master F1 8.8:8.8 reading
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