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  1. S

    Rifle Scopes How have the k624i Kahles been holding up?

    FWIW, I just had a great experience at the cup with my 6-24 AMR. I've only had it for a month or two, and only shot a couple matches with it so far, but mine is doing its job perfectly. Perfect tracking, and crisp clear image. To mirror what others are saying: as a lefty I love the parallax on...
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    Range Report JBM dope card is screwing with me. Starting to get frustrated! What am I missing!?!

    Thanks for all this Frank! I'm gonna go watch that video about 6 more times to let it all sink in. I hear ya: the basic concepts are not that complicated, but I still seem to get a mess every time I hit "calculate" on JBM! It is never obvious to me where the mistake is coming from...Gonna stay...
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    Range Report JBM dope card is screwing with me. Starting to get frustrated! What am I missing!?!

    OK, I hear what you guys are saying. I'm just playing with COFOX's numbers in an effort to learn and understand as much as I can at the moment. I'm heading to the range Monday and will do everything I can to bring back some rock solid data. I'll be shooting at paper out to 1k at a high power...
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    Range Report JBM dope card is screwing with me. Starting to get frustrated! What am I missing!?!

    To ad to the last post: COFOX and I are running very similar loads: 140's in 6.5cm with 25" barrels. His load is 42.3, mine is 42.4. I'm pretty convinced we should both be right around 2800fps... Using 29.92 inHg he's at 2850fps, and I'm 2875fps for our numbers to line up (that seems a little...
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    Range Report JBM dope card is screwing with me. Starting to get frustrated! What am I missing!?!

    I just tried pressure at 25.00 in Hg, H 50%, 67 F, 0 altitude, and I have to drop to 2740fps to get COFOX on 7.8mil @1k.. but all the other distances are off a click or two... I also tried pressure at 25.00 in Hg, H 50%, 67 F, 4850 altitude, and nothing changed... on at 1k with 7.8mil at...
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    Range Report JBM dope card is screwing with me. Starting to get frustrated! What am I missing!?!

    Hey there COFOX! Welcome to the fight against bad dope! I put your numbers into JMB with a velocity of 2850fps, 66F, 4850 for alt, 50% H, and left pressure at 29.92, NO LITTLE BOXES CHECKED and I get a perfect match to what you're seeing, with the exception of 521 (its giving me 2.7 for 525)...
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    Range Report JBM dope card is screwing with me. Starting to get frustrated! What am I missing!?!

    Hi Artee. Thanks very much. That is very helpful information! Much appreciated!
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    Range Report JBM dope card is screwing with me. Starting to get frustrated! What am I missing!?!

    Hi 17847. I noticed up to a full mil of difference when switching from G1 to G7 @ 1k when playing with JBM. I'm getting the same numbers you're getting with your shooter ap: and that's the problem -that's not what my gun is doing! Your numbers get me on at 700, but have me missing closer and...
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    Range Report JBM dope card is screwing with me. Starting to get frustrated! What am I missing!?!

    Thanks for the advice Steve! I appreciate the tips. I used to be real good about not making dumb mistakes -I think FT competition helped with that. I was never the guy who forgot to dial or shot at the wrong target..until just recently. I think now I'm starting over think stages and stress...
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    Range Report JBM dope card is screwing with me. Starting to get frustrated! What am I missing!?!

    I'd love to check out that video. I dig a little digging and wasn't able to find it. Is it part of your online tutorials? Or should I look for it someplace else?
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    Range Report JBM dope card is screwing with me. Starting to get frustrated! What am I missing!?!

    You are THE MAN damoncali! Much appreciated! Final answer (for JBM): leave both of the little option boxes un-checked, leave altitude at zero, put in temp, 50% H, and your own on-site pressure measurement. Got it! More questions: Say I want to get a ballpark estimate on what the pressure...
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    Range Report JBM dope card is screwing with me. Starting to get frustrated! What am I missing!?!

    Cheers Mr. O! Burning all my dope should help me with matches here in CO, but will still get me in trouble down at Raton, NM and up in Wheatland WY, right? haha... Looks like I'll be heading back to the range soon. Let me know if you're interested and have any free time!
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    Range Report JBM dope card is screwing with me. Starting to get frustrated! What am I missing!?!

    Ha! Hey Steve! Funny you should mention that! -That's my solution for my pistol problems lately. People tell me I'm anticipating recoil and have a horrendous flinch or something. Lately I've been getting some outstanding groups in the 2x4 target stand just below the plates I'm aiming at! haha...
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    Range Report JBM dope card is screwing with me. Starting to get frustrated! What am I missing!?!

    Ah, I see. Thanks again for another excellent explanation. I also put the same numbers into ballistic AE on my phone, and DID NOT get the same results. Perhaps AE does not have the same built in feature that estimates absolute pressure. Or perhaps I missed some seemingly random and yet very...
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    Range Report JBM dope card is screwing with me. Starting to get frustrated! What am I missing!?!

    OK, so check this out: KevinU was kind enough to talk me through a few things over the phone this afternoon, and suddenly JBM started getting really close to what I'm seeing. The elevation of the T3 ranch (location of this year's cup! -and where most of my data is coming from) is ~4600ft...
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    Range Report JBM dope card is screwing with me. Starting to get frustrated! What am I missing!?!

    Hi LawnMM! I would very much like to take you up on that offer. Thank you! You should have a PM incoming to talk more about that!
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    Range Report JBM dope card is screwing with me. Starting to get frustrated! What am I missing!?!

    Thanks a ton to all of you guys. I really appreciate everybody's time invested in this thread. I keep reading and re-reading and all this info is slowly sinking in. I see now you're all saying pretty much the same thing: I'm too sloppy with my inputs. I'm gonna start over from square one. I...
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    Range Report JBM dope card is screwing with me. Starting to get frustrated! What am I missing!?!

    Thanks for the input, Lowlight. My environmental data could very well be an issue because I admit this stuff confuses the hell out of me. Stuff like the differences between station pressure vs. absolute pressure and when I should use which one seems to be too much for my thick skull. I thought...
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    Range Report JBM dope card is screwing with me. Starting to get frustrated! What am I missing!?!

    Hi Diver160651, I did do a box test on the SWFA when I first got it. I recall going 2 or 3 mils up, right, down, and back left... No issues there. Then recently I put targets exactly 36" above each other at 100yds, and dialed up 10mils using the low target for POA. Both scopes drilled the...
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    Range Report JBM dope card is screwing with me. Starting to get frustrated! What am I missing!?!

    Hi NevadaZielmeister! Thanks for the help. This idea of a truing function sounds good to me (although my numbers are such a mess, I worry I could cause a crash when I put my data in! haha). I just bought a Kestrel 4000 (hoping that a solid DA reading would clear up my issues), I'd hate to have...
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