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The Basics, Starting Out
what is a ladder test??????
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<blockquote data-quote="BountyHunter" data-source="post: 95096" data-attributes="member: 12"><p>[ QUOTE ]</p><p>Bounty Hunter, now you have my attention.</p><p></p><p>Questions....</p><p></p><p>What is a node?</p><p></p><p>How do you spot the tuning nodes of a barrel using a chronograph?</p><p></p><p>Do you think it's possible for several dozen different rifles with different actions and barrel configurations to all shoot the same ammo into sub half-moa groups at 600 yards? </p><p></p><p>[/ QUOTE ]</p><p></p><p>A node is where the POI and the fps coincide. My previous post mentioned where the fps jumps shrink say 20 every shot to 3-4 shots going into a 15 fps extreme spread. Go to the next shot and you are back to 20 fps jumps and your bullet jumps POI. You have just discovered a node or sweet spot.</p><p></p><p>Shoot a 15-25 bullet ladder at .3gr intervals and can run into 2-4 nodes. Normally about 2-3 where POI and MV coincide.</p><p></p><p>Can a certain number of guns shoot the same load into .5 MOA? </p><p></p><p>A: You bet. Are we talking that is the best groups ever shot under ideal wind conditions? Does that mean those guns will do that day in day out in match conditions, then no way or they are all owned and shot by David Tubbs. </p><p></p><p>Does that mean that load is the best for that gun? Probably not, most people take a load and tweak it to a given point that they are happy with and leave it. The USMC team here at Quantico shoots one load for 600 yards using 90 gr JLKs with one powder and weight. Is it the most accurate load for each rifle no, but it gives acceptable accuracy out of the BR in all guns and they can live with that level. </p><p></p><p>Would love to see the equip list where 2 dozen guns on the line list exactly the same OCW load. Doubt you would see that even in the Palma guns where it has to be 308 and 155 bullets.</p><p></p><p>Pretty sure you are talking about the magic IMR 4895 load you mentioned earlier. Would almost bet that most that most of them started real near the magic number in ideal testing conditions, shot a couple groups that went .5, they were happy and suddenly the magic load works in every gun and suddenly the magic number is the most accurate load in the world in every gun because if gives .5 moa in a custom action and barreled gun. </p><p></p><p>Any LR BR gun with dang near any load will post .5 MOA at 600 in match conditions day in day out. </p><p></p><p>Will that win in 600 yd BR even if shot off a rest? No way! Got to be in the .2-.3 MOA arena and OCW will not get you there from what I have seen. Or at least on one has been able to prove it yet.</p><p></p><p>BH</p></blockquote><p></p>
[QUOTE="BountyHunter, post: 95096, member: 12"] [ QUOTE ] Bounty Hunter, now you have my attention. Questions.... What is a node? How do you spot the tuning nodes of a barrel using a chronograph? Do you think it's possible for several dozen different rifles with different actions and barrel configurations to all shoot the same ammo into sub half-moa groups at 600 yards? [/ QUOTE ] A node is where the POI and the fps coincide. My previous post mentioned where the fps jumps shrink say 20 every shot to 3-4 shots going into a 15 fps extreme spread. Go to the next shot and you are back to 20 fps jumps and your bullet jumps POI. You have just discovered a node or sweet spot. Shoot a 15-25 bullet ladder at .3gr intervals and can run into 2-4 nodes. Normally about 2-3 where POI and MV coincide. Can a certain number of guns shoot the same load into .5 MOA? A: You bet. Are we talking that is the best groups ever shot under ideal wind conditions? Does that mean those guns will do that day in day out in match conditions, then no way or they are all owned and shot by David Tubbs. Does that mean that load is the best for that gun? Probably not, most people take a load and tweak it to a given point that they are happy with and leave it. The USMC team here at Quantico shoots one load for 600 yards using 90 gr JLKs with one powder and weight. Is it the most accurate load for each rifle no, but it gives acceptable accuracy out of the BR in all guns and they can live with that level. Would love to see the equip list where 2 dozen guns on the line list exactly the same OCW load. Doubt you would see that even in the Palma guns where it has to be 308 and 155 bullets. Pretty sure you are talking about the magic IMR 4895 load you mentioned earlier. Would almost bet that most that most of them started real near the magic number in ideal testing conditions, shot a couple groups that went .5, they were happy and suddenly the magic load works in every gun and suddenly the magic number is the most accurate load in the world in every gun because if gives .5 moa in a custom action and barreled gun. Any LR BR gun with dang near any load will post .5 MOA at 600 in match conditions day in day out. Will that win in 600 yd BR even if shot off a rest? No way! Got to be in the .2-.3 MOA arena and OCW will not get you there from what I have seen. Or at least on one has been able to prove it yet. BH [/QUOTE]
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what is a ladder test??????
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