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Rifles, Reloading, Optics, Equipment
Reloading
Blown primer in .243 Ackley
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<blockquote data-quote="coyotezapper" data-source="post: 1541361" data-attributes="member: 20438"><p>I was going to read the whole thread before making a comment but there is too many things here that are wrong to start with.</p><p></p><p>1. You mention QL data so lets start there. First off the new 6mm LRX 95 bullet has not been updated in QL. There should be an update this month. Assuming that another X" bullet of the same weight is the same is WRONG. I don't know where you got your QL data above but it does not mirror my data. 46 grains is almost max and 50 grains is 68K with standard "TSX" bullet. PMAX for the 243AI is <strong>55K.</strong></p><p></p><p>2. Barnes bullets - solids do not obturate like lead core bullets so they have to be jumped so the initial pressure does not spike. There is a reason Barnes recommends jumping them .050" to begin with and then adjust moving away from the lands if needed for tuning.</p><p></p><p>3. Did you adjust your case capacity in data point in QL? Different case capacities will change pressures.</p><p></p><p>I am not going to comment any further because to me its obvious what you should do. You need to start over with the bullet seated .050" off of the lands and start your testing over. Start at 42 grains moving up and look for a velocity of 3100 fps. Don't get caught up trying to determine pressure by looking at your case. By the time pressure swipes or other indicators show up you are past pmax.</p><p></p><p>The Barnes bullets are excellent bullets and easy to load. Do not be afraid to jump them over .100" if needed as they will shoot excellent at these lengths. Pat attention to remaining velocity when determining the bullets effective range. This bullets limit is 1800 fps. Once it drops below this velocity its performance suffers.</p><p></p><p>Also, you mentioned Hammer Bullets not having the B.C.'s you are looking for. You need to look at them again. Hammer Bullets have a higher B.C. than Barnes. They list theirs as a G7 and Barnes G1.</p></blockquote><p></p>
[QUOTE="coyotezapper, post: 1541361, member: 20438"] I was going to read the whole thread before making a comment but there is too many things here that are wrong to start with. 1. You mention QL data so lets start there. First off the new 6mm LRX 95 bullet has not been updated in QL. There should be an update this month. Assuming that another X" bullet of the same weight is the same is WRONG. I don't know where you got your QL data above but it does not mirror my data. 46 grains is almost max and 50 grains is 68K with standard "TSX" bullet. PMAX for the 243AI is [B]55K.[/B] 2. Barnes bullets - solids do not obturate like lead core bullets so they have to be jumped so the initial pressure does not spike. There is a reason Barnes recommends jumping them .050" to begin with and then adjust moving away from the lands if needed for tuning. 3. Did you adjust your case capacity in data point in QL? Different case capacities will change pressures. I am not going to comment any further because to me its obvious what you should do. You need to start over with the bullet seated .050" off of the lands and start your testing over. Start at 42 grains moving up and look for a velocity of 3100 fps. Don't get caught up trying to determine pressure by looking at your case. By the time pressure swipes or other indicators show up you are past pmax. The Barnes bullets are excellent bullets and easy to load. Do not be afraid to jump them over .100" if needed as they will shoot excellent at these lengths. Pat attention to remaining velocity when determining the bullets effective range. This bullets limit is 1800 fps. Once it drops below this velocity its performance suffers. Also, you mentioned Hammer Bullets not having the B.C.'s you are looking for. You need to look at them again. Hammer Bullets have a higher B.C. than Barnes. They list theirs as a G7 and Barnes G1. [/QUOTE]
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Reloading
Blown primer in .243 Ackley
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