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Rifles, Reloading, Optics, Equipment
Reloading
Any (7mm-08 / H414 [or 760] / 139SST) 1st hand experience?
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<blockquote data-quote="nkyshooter" data-source="post: 2143127" data-attributes="member: 83787"><p>[USER=102230]@308win[/USER] - here is more info ...</p><p></p><p>Naturally, with this development going on at 45F, I don't want to end up settling on "too high" a charge weight on the outside chance I do fire it in summer weather ... 47.6-48.5g looks REALLY good - except for that funky anomaly at 47.9. Disregarding that (and assuming my chrono has not soiled the bed) I have an ES of 19 on a charge window of about 1g - that would be AWESOME if it is truly accurate.</p><p></p><p></p><p>Neck tension was using a Lee FL sizing die (not my normal approach after finding my load as I typically use a Lee collet - but this is my only current option for FL sizing 7mm-08 at this point). I seated with a Frankford Arsenal Universal Micrometer Adjust seating die using the medium stem. I set the COAL by first using a stoney point guage with a factory modified case (not homemade) to get my COAL at the lands of about 2.860' ... seating to the cannelure put me at approx 2.795" COAL tip to base - I did not use a comparator.</p><p></p><p>I used a Lee Factory Crimp die to just put a very light crimp on them for added consistency.</p><p></p><p>BTW - prior to priming with the BR2's, I used the Frankford Arsenal Case Prep Center and trimmed all to hornady published "Trim Length" then weight sorted and then sorted out 15 of the heaviest I could that would all be within .2g of one another ... my h2o measurement validates for me that I have very consistent internal volume in the cases I used for this ladder test.</p><p></p><p>Temp at time of firing was approximately 45F - I was fully shaded and so was the chrono ... chrono was set up with sun shades but was close enough to rifle that the muzzle blast blew off the sunshades about half way through or so ... Roughly 2-3 feet from muzzle or so? ...</p><p></p><p>My record is below - let me know what else I can tell you that will be of assistance?</p><p></p><p></p><table style='width: 100%'><tr><td></td><td>Charge wt</td><td>Velocity</td><td>Observations/Notes</td></tr><tr><td>1</td><td>46.7</td><td>2858</td><td>False reading? 1st shot on cold barrel ...</td></tr><tr><td>2</td><td>47.0</td><td>3022</td><td></td></tr><tr><td>3</td><td>47.3</td><td>3033</td><td></td></tr><tr><td>4</td><td>47.6</td><td>3045</td><td></td></tr><tr><td>5</td><td>47.9</td><td>3092</td><td>Oddly higher than next 2?</td></tr><tr><td>6</td><td>48.2</td><td>3061</td><td></td></tr><tr><td>7</td><td>48.5</td><td>3064</td><td></td></tr><tr><td>8</td><td>48.8</td><td>3105</td><td></td></tr><tr><td>9</td><td>49.1</td><td>3118</td><td></td></tr><tr><td>10</td><td>49.4</td><td>3134</td><td></td></tr><tr><td>11</td><td>49.7</td><td>3168</td><td></td></tr><tr><td>12</td><td>50.0</td><td>3192</td><td></td></tr><tr><td>13</td><td>50.3</td><td>3180</td><td></td></tr><tr><td>14</td><td>50.6</td><td>3208</td><td>clear shiny ejector plunger circle</td></tr></table></blockquote><p></p>
[QUOTE="nkyshooter, post: 2143127, member: 83787"] [USER=102230]@308win[/USER] - here is more info ... Naturally, with this development going on at 45F, I don't want to end up settling on "too high" a charge weight on the outside chance I do fire it in summer weather ... 47.6-48.5g looks REALLY good - except for that funky anomaly at 47.9. Disregarding that (and assuming my chrono has not soiled the bed) I have an ES of 19 on a charge window of about 1g - that would be AWESOME if it is truly accurate. Neck tension was using a Lee FL sizing die (not my normal approach after finding my load as I typically use a Lee collet - but this is my only current option for FL sizing 7mm-08 at this point). I seated with a Frankford Arsenal Universal Micrometer Adjust seating die using the medium stem. I set the COAL by first using a stoney point guage with a factory modified case (not homemade) to get my COAL at the lands of about 2.860' ... seating to the cannelure put me at approx 2.795" COAL tip to base - I did not use a comparator. I used a Lee Factory Crimp die to just put a very light crimp on them for added consistency. BTW - prior to priming with the BR2's, I used the Frankford Arsenal Case Prep Center and trimmed all to hornady published "Trim Length" then weight sorted and then sorted out 15 of the heaviest I could that would all be within .2g of one another ... my h2o measurement validates for me that I have very consistent internal volume in the cases I used for this ladder test. Temp at time of firing was approximately 45F - I was fully shaded and so was the chrono ... chrono was set up with sun shades but was close enough to rifle that the muzzle blast blew off the sunshades about half way through or so ... Roughly 2-3 feet from muzzle or so? ... My record is below - let me know what else I can tell you that will be of assistance? [TABLE] [TR] [TD][/TD] [TD]Charge wt[/TD] [TD]Velocity[/TD] [TD]Observations/Notes[/TD] [/TR] [TR] [TD]1[/TD] [TD]46.7[/TD] [TD]2858[/TD] [TD]False reading? 1st shot on cold barrel ...[/TD] [/TR] [TR] [TD]2[/TD] [TD]47.0[/TD] [TD]3022[/TD] [TD][/TD] [/TR] [TR] [TD]3[/TD] [TD]47.3[/TD] [TD]3033[/TD] [TD][/TD] [/TR] [TR] [TD]4[/TD] [TD]47.6[/TD] [TD]3045[/TD] [TD][/TD] [/TR] [TR] [TD]5[/TD] [TD]47.9[/TD] [TD]3092[/TD] [TD]Oddly higher than next 2?[/TD] [/TR] [TR] [TD]6[/TD] [TD]48.2[/TD] [TD]3061[/TD] [TD][/TD] [/TR] [TR] [TD]7[/TD] [TD]48.5[/TD] [TD]3064[/TD] [TD][/TD] [/TR] [TR] [TD]8[/TD] [TD]48.8[/TD] [TD]3105[/TD] [TD][/TD] [/TR] [TR] [TD]9[/TD] [TD]49.1[/TD] [TD]3118[/TD] [TD][/TD] [/TR] [TR] [TD]10[/TD] [TD]49.4[/TD] [TD]3134[/TD] [TD][/TD] [/TR] [TR] [TD]11[/TD] [TD]49.7[/TD] [TD]3168[/TD] [TD][/TD] [/TR] [TR] [TD]12[/TD] [TD]50.0[/TD] [TD]3192[/TD] [TD][/TD] [/TR] [TR] [TD]13[/TD] [TD]50.3[/TD] [TD]3180[/TD] [TD][/TD] [/TR] [TR] [TD]14[/TD] [TD]50.6[/TD] [TD]3208[/TD] [TD]clear shiny ejector plunger circle[/TD] [/TR] [/TABLE] [/QUOTE]
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Reloading
Any (7mm-08 / H414 [or 760] / 139SST) 1st hand experience?
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