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The Range
Ammo & Reloading
Load development question
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<blockquote data-quote="swampratt" data-source="post: 3855180" data-attributes="member: 15054"><p>Brass annealing or brass prep can cause this also.</p><p>Not all brass is made of the same alloy and even if it is from the same batch even Lapua you can have variances.</p><p>That is where you can see the big velocity spreads.</p><p>I have a couple rifles that will not shoot good tight groups with Lapua cases until i turn the necks.</p><p></p><p>Your groups are in a good size and if it was mine I would take it to 200 yards and see what happens.</p><p></p><p>Unless you are only shooting 100 yards with it then ultimate brass prep will need to begin.</p><p>And measuring every bullet with a comparator will help also.</p><p></p><p>Another easy thing is notice how long each loaded round is being cooked in the chamber.</p><p>If you shoot one round from cold chamber and then shoot another in 10 seconds then chamber a round and let it warm up in the chamber while you adjust the bag and blink your eyes for 45 seconds and write down velocity the group will suffer.</p><p></p><p>Be very aware of seating forces when making ammo and if you feel one seat a wee bit easier than the rest then mark that case and see if it is out of the group.</p><p></p><p>Ultimate brass prep done and you have different seating forces could be a different alloy issues.</p><p>And could also be you scratched your face before you picked up that bullet to place it on the case to be seated and the oil on your fingers lubed the bullet.</p><p></p><p>Hornady bullets have a waxy surface on some of the ones i have bought.</p><p>I wipe down every bullet with a paper towel.</p><p>That towel will do only so many bullets before all the space on it has touched a bullet.</p><p></p><p>I go as far as to dry/wipe my fingers on a paper towel before each bullet is picked up.</p><p>Think about touching a case that was prepped and has a slight amount of lube on the case then picking up a bullet.</p><p></p><p>Think your fingers are clean and dry after picking up a case.</p><p></p><p>Go into the bathroom and wipe your fingers on the mirror and see if you leave a smear.</p><p></p><p>Pick up a bullet with your fingers and do the same test to see if your bullets have a waxy film on them.</p><p></p><p>Eliminating every possible variable we can during reloading is usually why we reload rifles for accuracy.</p></blockquote><p></p>
[QUOTE="swampratt, post: 3855180, member: 15054"] Brass annealing or brass prep can cause this also. Not all brass is made of the same alloy and even if it is from the same batch even Lapua you can have variances. That is where you can see the big velocity spreads. I have a couple rifles that will not shoot good tight groups with Lapua cases until i turn the necks. Your groups are in a good size and if it was mine I would take it to 200 yards and see what happens. Unless you are only shooting 100 yards with it then ultimate brass prep will need to begin. And measuring every bullet with a comparator will help also. Another easy thing is notice how long each loaded round is being cooked in the chamber. If you shoot one round from cold chamber and then shoot another in 10 seconds then chamber a round and let it warm up in the chamber while you adjust the bag and blink your eyes for 45 seconds and write down velocity the group will suffer. Be very aware of seating forces when making ammo and if you feel one seat a wee bit easier than the rest then mark that case and see if it is out of the group. Ultimate brass prep done and you have different seating forces could be a different alloy issues. And could also be you scratched your face before you picked up that bullet to place it on the case to be seated and the oil on your fingers lubed the bullet. Hornady bullets have a waxy surface on some of the ones i have bought. I wipe down every bullet with a paper towel. That towel will do only so many bullets before all the space on it has touched a bullet. I go as far as to dry/wipe my fingers on a paper towel before each bullet is picked up. Think about touching a case that was prepped and has a slight amount of lube on the case then picking up a bullet. Think your fingers are clean and dry after picking up a case. Go into the bathroom and wipe your fingers on the mirror and see if you leave a smear. Pick up a bullet with your fingers and do the same test to see if your bullets have a waxy film on them. Eliminating every possible variable we can during reloading is usually why we reload rifles for accuracy. [/QUOTE]
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