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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Preliminary results LOST RIVER 162 Gr 7 MM J40 Ballistics
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<blockquote data-quote="BountyHunter" data-source="post: 24072" data-attributes="member: 12"><p>Daveosok</p><p></p><p>you are right that if you do not have at least a close idea on what the powder range is to go to larger spreads such as .3-.5 grains and obviously on the larger cases Still the method works far superior to any other method to quickly find sweet spots within a given MV range for that barrel. Given your 6.5 grain spread with .4 increments you only need 16 bullets to cover the entire range. Firing 3 shot groups to cover the spread at the same .4 interval you use 48 bullets and that is one powder and one bullet. No matter what, it is a faster and less expensive way to completely cover a powder range and find the sweet spots. Otherwise it is a lot more time and expense to cover the same range for each powder bullet combo.</p><p></p><p>I have just found that this is much more systematic, faster and more accurately covers the spectrum of possible loads for a rifle better than any other method I have seen. No matter what cartridge, we can normally pick 2-3 powders that will work and 2-3 bullets. Out of that we only have to shoot a max of 4-9 ladders of 15-20 shots versus 144 of the 3-5 shot groups to cover the same powder ranges and get us to the same point of where we are fine tuning a load that we know will work. Samething, if we start in the lands, all we have to do is come out at whatever interval you want to use. I had used the 3-5 shot group method and constantly chased a proven load for weeks and months. Until I started this, I never had confidence that I had found the "best" load for a given bullet powder combo. With 150 pieces of brass, I can shoot the 9 ladders in one afternoon and be fine tuning loads the next day. Othewise, you are shooting 3-5 shot groups for months unless you get lucky or tired and say that is good enough.</p><p></p><p>We at least end up with a load that will shoot. We can continue to test other powder bullet combos and see if we can find something that will beat it, but we are shooting a proven load until then.</p><p></p><p>Finally, what is the cost versus benefit of the LRBTs? Are you realistically going to be shooting distances and cartridge combos where the ballistics with them is offering you a marked advantage. In other words is 4"-10" less drop at your given range worth the cost. Do not know, but something to consider. Having said that, I will say I have not used them, know people who do and like them. I think they offer a ballistics advantage at the ultra LR ranges if their accuracy will hold up in your gun, but with rangefinders I am not sure you gain any advantage. I just cannot figure out a significent advantage for me given my circumstances and hunting conditions and their cost.</p><p></p><p>Good luck</p><p></p><p>BH</p></blockquote><p></p>
[QUOTE="BountyHunter, post: 24072, member: 12"] Daveosok you are right that if you do not have at least a close idea on what the powder range is to go to larger spreads such as .3-.5 grains and obviously on the larger cases Still the method works far superior to any other method to quickly find sweet spots within a given MV range for that barrel. Given your 6.5 grain spread with .4 increments you only need 16 bullets to cover the entire range. Firing 3 shot groups to cover the spread at the same .4 interval you use 48 bullets and that is one powder and one bullet. No matter what, it is a faster and less expensive way to completely cover a powder range and find the sweet spots. Otherwise it is a lot more time and expense to cover the same range for each powder bullet combo. I have just found that this is much more systematic, faster and more accurately covers the spectrum of possible loads for a rifle better than any other method I have seen. No matter what cartridge, we can normally pick 2-3 powders that will work and 2-3 bullets. Out of that we only have to shoot a max of 4-9 ladders of 15-20 shots versus 144 of the 3-5 shot groups to cover the same powder ranges and get us to the same point of where we are fine tuning a load that we know will work. Samething, if we start in the lands, all we have to do is come out at whatever interval you want to use. I had used the 3-5 shot group method and constantly chased a proven load for weeks and months. Until I started this, I never had confidence that I had found the "best" load for a given bullet powder combo. With 150 pieces of brass, I can shoot the 9 ladders in one afternoon and be fine tuning loads the next day. Othewise, you are shooting 3-5 shot groups for months unless you get lucky or tired and say that is good enough. We at least end up with a load that will shoot. We can continue to test other powder bullet combos and see if we can find something that will beat it, but we are shooting a proven load until then. Finally, what is the cost versus benefit of the LRBTs? Are you realistically going to be shooting distances and cartridge combos where the ballistics with them is offering you a marked advantage. In other words is 4"-10" less drop at your given range worth the cost. Do not know, but something to consider. Having said that, I will say I have not used them, know people who do and like them. I think they offer a ballistics advantage at the ultra LR ranges if their accuracy will hold up in your gun, but with rangefinders I am not sure you gain any advantage. I just cannot figure out a significent advantage for me given my circumstances and hunting conditions and their cost. Good luck BH [/QUOTE]
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Preliminary results LOST RIVER 162 Gr 7 MM J40 Ballistics
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