Trajectory calculator

[camping1601]

Can someone recommend one that doesn't need velocity?
Looking to input 100 and 300 yard bullet drop and get drop at 300-500 yards.
I was thinking I could use the graphs in reloading manuals, but wondering if there's something better.

 

[mcr-85]

Can someone recommend one that doesn't need velocity?
Looking to input 100 and 300 yard bullet drop and get drop at 300-500 yards.
I was thinking I could use the graphs in reloading manuals, but wondering if there's something better.

I think without inputting a velocity you'll have a hard time being accurate. Maybe there is something but I don't know of anything like that.

Sent from my VS995 using Tapatalk

 

[davsco]

so you're saying you have a 100yd zero and know your drop at 300? put in what you know (bc, scope height, etc) and then just fudge velocity until it matches up with your 300yd data. always check your chart against real live shooting though just to be sure.

 

[camping1601]

so you're saying you have a 100yd zero and know your drop at 300? put in what you know (bc, scope height, etc) and then just fudge velocity until it matches up with your 300yd data. always check your chart against real live shooting though just to be sure.

Good idea. Whats a good calculator to use?

 

[mcr-85]

Good idea. Whats a good calculator to use?

Shooter has a velocity verifying tool. You shoot your drops and it will adjust your velocity to match your drops.

Sent from my VS995 using Tapatalk

 

[Skyewalker]

Applied ballistics will do that for you given you input accurate info on HOB, BC, DensALT etc. Best to pair it up with Kestrel to get accurate info as far as atmospherics.


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[RosinBag]

I don't think you can get that accurate with 100 and 300 yard data. I suppose you get close, but collecting short range data and having it produce long range data isn't optimum. If you have a place to go shoot a mid range (600) and a long range (1000) you are much better off. If you don't have a place to do that, I think it is a hope the data you deduce from what you already have will produce anything but mediocre results.

 

[camping1601]

Thanks for the help.
Furthest shot I have available is around 360.
I'm not looking to be a long range hunter, but would like to stretch my hunting distance past that 360 I can confirm.
I guess I'll have to leave it at that for now.

 

[pods8 (Rugged Stitching)]

Ethically speaking don't try to hunt something you haven't practiced...

 

[TauPhi111]

You can pick up a chorograph for less than 100 bucks. I have the caldwell ballistic pro and I think it is pretty accurate since I'm hitting where I intend to. If you have a bigger budget you can get a magnetospeed which is supposed to be super accurate. With that, you can have all the pieces of info you need to get an accurate trajectory plot. You'll find that it is often BC that needs adjusted if you have accurate velocity. Advertised BC is often not that accurate. Nosler has a reputation for inflating BC. But once you have all the pieces of the puzzle, shooter or strelok are good free apps.

 

[davsco]

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i use 'shooter' on my galaxy s6active, ten bucks. haven't used the ones above but give them a try. again, with only one data point (300yd drop you know) it won't be super accurate but should get you started, especially if you're only going out to 500 yds. but again, make sure you actually shoot all the way out to your desired distance (find a range that will let you do that) so you KNOW where your bullet impacts, not just a guess, although an educated one, at where it should hit.

even if you do this the 'right' way and chrono your cartridge/load, should still shoot at desired distances to confirm point of impact.

 

[the0thermrt]

strelok Pro will also give you velocity and match the curve to yours. that is if your BC is correct. but inside 500 yd most rounds out of the same gun will do pretty much near the same thing.

 

[doverpack12]

Vortex has a G7 Ballistic calculator on their website that is based on gunwerks G7 program. Gunwerks goes through how to set it up and I think vortex has some videos on their site as well. They initially just guess a velocity they think is close then go shoot their longer range groups and record adjustment to poin of aim and enter that into the ballistic calibration.

 

[V65Magna]

Until I got my Magnetospeed Sporter, I always used to just look in the back of my reloading manual (Nosler) at the charts for the velocity and BC and figure the drops from there. If you don't have a reloading manual and/or using factory ammo, maybe the velocity is on the box? Anyway, the reloading manual charts were fairly close for the POI above the line of sight that I would have to set to be good, zeroed out to 300 yards or so. Once I started going out longer distances I needed to up my game with the Magnetospeed and StrelokPro to get the results I wanted.