On my wife's 6BR when I input all the information for 600 yds. It comes up differently for each app? Lapua calls for 25.1 MOA or 201 clicks. Strelok calls for 21.2 MOA or 170 clicks. It is a 1/8 MOA click scope. I have gone through the information that I have provided for each app. Can't seem to find anything that is different? Any suggestions on what is going on?
Difference between Lapua and Strelok app ?
- Thread starter Nuclear Worker
- Start date
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Yes I understand I need to confirm with real world data from shooting. Just confused why they are so different. Can't find any info that isn't the same?
Thank you for your help though.
cohunt
Well-Known Member
Streelok to hornady to applied are also slightly different-- I think they use different algorithms for calculations
Wow..that must be a really slow shooting rifle....my 65284 is on 10.25moa a 600....
'But...it's not rocket science'.....
Take it to a range..dial and shoot for each..see which app works correctly...
That's the fun of loading and shooting...
Discovery
'But...it's not rocket science'.....
Take it to a range..dial and shoot for each..see which app works correctly...
That's the fun of loading and shooting...
Discovery
Bang4theBuck
Well-Known Member
Did you possibly input a different drag model (G1 vs G7)? Or even if you didn't purposely input that value, sometimes it auto-populates to one or the other.
I will have to check it again? Me and technology are not friends.
Bang4theBuck
Well-Known Member
At that range, and at those velocities it would seem plausible that the difference in BC would make that much difference. If you input the same BC value but in different drag models one bullet would be close to half as aerodynamic as the other in the calculation.
DakotaRingo
Member
Suggest you put in a commerical off the shelf round like Hornaday 6mm ARC identical bullet weights in both calculators. See if the calculations are closer. If they are very similar you know your data of hand loads input differently. If the calculations are off set similarly to your 6BR, then you know that it's in your associated data, like wind?
VarmintBob
Well-Known Member
your inputs are different. There is no way any modern external ballistics app will be more than 1 click different with the same inputs.
montanamurf
Member
Nuclear Worker:
Your math and Apps seem way off … in a fairly large way.
You did not post it, but I suspect your 6BR has an MV somewhere around 2,900 fps (depending on bullet, bullet weight, barrel length, charge, powder etc …..).
If so, and you are using a high end well designed high BC bullet, you should be seeing 600 yard come-ups around 11 MOA or so (based on a 100 yard zero).
I'd be happy to help …. But I suspect you're missing some critical data and/or have put it in the apps wrong. If you want and are able, Drop me a private PM sending me your email … and following that I'd want you to send me a snapshot of your data entry page for ISTRELOK along with all your rifle/bullet info (I suspect you are using hand-loads).Hopefully we will be able to fix it there.
I use both apps (Stelok more) and both are normally spot on. I suspect you either have your BC input incorrectly, MV off, or ….
Happy to help…. Drop me a line.
I shoot 6mm all the time out to 1,000 yards at matches and hold a national record so am pretty aware of what this cartridge can do, and what it's ballistics are doing …. And routinely use the APPS you are having issues with. Drop me a line…. Happy to help.
Your math and Apps seem way off … in a fairly large way.
You did not post it, but I suspect your 6BR has an MV somewhere around 2,900 fps (depending on bullet, bullet weight, barrel length, charge, powder etc …..).
If so, and you are using a high end well designed high BC bullet, you should be seeing 600 yard come-ups around 11 MOA or so (based on a 100 yard zero).
I'd be happy to help …. But I suspect you're missing some critical data and/or have put it in the apps wrong. If you want and are able, Drop me a private PM sending me your email … and following that I'd want you to send me a snapshot of your data entry page for ISTRELOK along with all your rifle/bullet info (I suspect you are using hand-loads).Hopefully we will be able to fix it there.
I use both apps (Stelok more) and both are normally spot on. I suspect you either have your BC input incorrectly, MV off, or ….
Happy to help…. Drop me a line.
I shoot 6mm all the time out to 1,000 yards at matches and hold a national record so am pretty aware of what this cartridge can do, and what it's ballistics are doing …. And routinely use the APPS you are having issues with. Drop me a line…. Happy to help.
Thanks for everyone's help. I will try and find my mistake again.
