Does anyone have a drop chart for 338 Lapua. I would like to see someones real world data that has been tested in the field.
Thanks
Thanks
338 Lapua drop charts anyone care to share
- Thread starter CSiebert
- Start date
Re: 338 Lapua drop charts anyone care to share
What is your muzzle velocity and how many MOA from 300 to 800?
What is your muzzle velocity and how many MOA from 300 to 800?
Re: 338 Lapua drop charts anyone care to share
As Dave says. Shoot your hundred yard zero and 300 and 400 yard drops and match them with JBM. You'll be closer than most folks can range and shoot. JMHO
As Dave says. Shoot your hundred yard zero and 300 and 400 yard drops and match them with JBM. You'll be closer than most folks can range and shoot. JMHO
Re: 338 Lapua drop charts anyone care to share
I have my zero but it is @ 300 yards I also have dope for 400, 600, 800. Should I adjust JBM until I get the same results. What do you recomend adjusting.
I have my zero but it is @ 300 yards I also have dope for 400, 600, 800. Should I adjust JBM until I get the same results. What do you recomend adjusting.
Re: 338 Lapua drop charts anyone care to share
I worked mine ass backward. I don't have a chrono, so I tweaked JMB until it matched my drops at known distances (100, 200, 300, 400, 500, 600). I have not tested it out to distance yet (800-1000)but I have no doubt that my dope will track with JBM. My range can only go to 1200, but I'm confident that my DA chart will give me good numbers within my range. ELR (1500+) is another matter which I don't anticipate needing but I would have no hesitation trusting the JBM numbers.
I started with a 100 yard zero and then shot at each known distance and simply measured the drop. Using JBM, you can estimate your muzzle velocity which is the variable I changed to match the program with my actual field data. Maybe bone-head, but it works for me
I hope to shoot through a chrono at some point to confirm my estimated MV.
I worked mine ass backward. I don't have a chrono, so I tweaked JMB until it matched my drops at known distances (100, 200, 300, 400, 500, 600). I have not tested it out to distance yet (800-1000)but I have no doubt that my dope will track with JBM. My range can only go to 1200, but I'm confident that my DA chart will give me good numbers within my range. ELR (1500+) is another matter which I don't anticipate needing but I would have no hesitation trusting the JBM numbers.
I started with a 100 yard zero and then shot at each known distance and simply measured the drop. Using JBM, you can estimate your muzzle velocity which is the variable I changed to match the program with my actual field data. Maybe bone-head, but it works for me
Re: 338 Lapua drop charts anyone care to share
Thanks for the input Dave I think I'm gonna give your method a try.
Thanks for the input Dave I think I'm gonna give your method a try.
Re: 338 Lapua drop charts anyone care to share
There is a device available that has the JBM engine in it and it mounts to your rifle to give you exactly what you are looking for.
I know this, because I make this product.
I just ran the .338 Lupua 300gr against the JBM solution and they are within 1" of each other at 1500Y.
You can find the RIANOV at: www.RIANOV.com or on the JBM website at:
http://www.jbmballistics.com/ballistics/hardware/hardware.shtml
Sorry it took us 6 month to let you know... we've been busy.
There is a device available that has the JBM engine in it and it mounts to your rifle to give you exactly what you are looking for.
I know this, because I make this product.
I just ran the .338 Lupua 300gr against the JBM solution and they are within 1" of each other at 1500Y.
You can find the RIANOV at: www.RIANOV.com or on the JBM website at:
http://www.jbmballistics.com/ballistics/hardware/hardware.shtml
Sorry it took us 6 month to let you know... we've been busy.
Re: 338 Lapua drop charts anyone care to share
Looks very interesting...what is the anticipated battery life?
Looks very interesting...what is the anticipated battery life?
Re: 338 Lapua drop charts anyone care to share
Battery life for a typical user (hunter/sport shooter) 3 years, or for a heavy user (military sniper) 6 months. This is on one CR123 battery.
The device automatically shuts off after a user set number of seconds (10-99 seconds), so no worries about leaving it on.
Battery life for a typical user (hunter/sport shooter) 3 years, or for a heavy user (military sniper) 6 months. This is on one CR123 battery.
The device automatically shuts off after a user set number of seconds (10-99 seconds), so no worries about leaving it on.
Re: 338 Lapua drop charts anyone care to share
That sounds a bit more promising than the BORS I used to have. Is there an interface/application to use with a data port, or is all the information set up manually?
That sounds a bit more promising than the BORS I used to have. Is there an interface/application to use with a data port, or is all the information set up manually?
Re: 338 Lapua drop charts anyone care to share
It is a manual entry. The initial customer feedback received during our initial trials were for the manual entry vs the computer interface. It take 3-5 minutes per custom weapon system to enter all the required data fields. The device has a data port, but we are currently not using it for anything.
It is a manual entry. The initial customer feedback received during our initial trials were for the manual entry vs the computer interface. It take 3-5 minutes per custom weapon system to enter all the required data fields. The device has a data port, but we are currently not using it for anything.
