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Rifles, Reloading, Optics, Equipment
Reloading
Help with Ladder Test Results
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<blockquote data-quote="tlk" data-source="post: 434614" data-attributes="member: 11397"><p>I did not put them through my chrony - I have suspisions that it is lying to me based on a couple of other load tests. I am trying to get ahold of another to verify it.</p><p> </p><p>The details, for both the 300 and 600 yard sessions:</p><p> </p><p>Shot rate: every 3 mins, minimum time span, most were more. Barrel was not allowed to get beyond warm (i.e., no where near hot, closer to first shot warm). </p><p> </p><p>Best Seating depth is at 0.002" off of the lands. Seems to be best here.</p><p>Lapua brass, fireformed, slight crush fit to chamber</p><p>Case mouth sized at 0.02 under caliber, confirmed with pin guage.</p><p>Case neck turned to 0.014, all consistent.</p><p>Cases were in second firing off of annealing</p><p>Brass OAL was consistent</p><p>Brass cleaned with ultrasonic cleaner - insides were mirror clean</p><p>Flasholes deburred</p><p>Primer pockets uniformed</p><p>Case mouths with VLD chamfer</p><p>Bullets were all measured and matched in bearing surface - all same to within 0.0005 (using dial caliper)</p><p>cartridge length at bullet ogive was within 0.001 of being the same (that took a LONG time, lots of slow work there)</p><p>Powder charges were measured with a tuned Ohaus 5 beam scale. Was verified with scale weights at multiple points in reloading the 20 shots.</p><p> </p><p> I cannot figure out why I am not getting that cool stringing everyone shows, just a group of shots. At 600 it is only then beginning to show some relevance to the powder charge, but I still have groups that are intersecting - a lot. I spent some serious time on the ammo to take out all the "noise" that I could.</p><p> </p><p>Thanks.</p></blockquote><p></p>
[QUOTE="tlk, post: 434614, member: 11397"] I did not put them through my chrony - I have suspisions that it is lying to me based on a couple of other load tests. I am trying to get ahold of another to verify it. The details, for both the 300 and 600 yard sessions: Shot rate: every 3 mins, minimum time span, most were more. Barrel was not allowed to get beyond warm (i.e., no where near hot, closer to first shot warm). Best Seating depth is at 0.002" off of the lands. Seems to be best here. Lapua brass, fireformed, slight crush fit to chamber Case mouth sized at 0.02 under caliber, confirmed with pin guage. Case neck turned to 0.014, all consistent. Cases were in second firing off of annealing Brass OAL was consistent Brass cleaned with ultrasonic cleaner - insides were mirror clean Flasholes deburred Primer pockets uniformed Case mouths with VLD chamfer Bullets were all measured and matched in bearing surface - all same to within 0.0005 (using dial caliper) cartridge length at bullet ogive was within 0.001 of being the same (that took a LONG time, lots of slow work there) Powder charges were measured with a tuned Ohaus 5 beam scale. Was verified with scale weights at multiple points in reloading the 20 shots. I cannot figure out why I am not getting that cool stringing everyone shows, just a group of shots. At 600 it is only then beginning to show some relevance to the powder charge, but I still have groups that are intersecting - a lot. I spent some serious time on the ammo to take out all the "noise" that I could. Thanks. [/QUOTE]
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Help with Ladder Test Results
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