Ballitic Calculators

Hunkyfish · Nov 18, 2014

Does anyone have one of the high end programs & could run some numbers for me ?
I am shooting a 6.5x55 120gr Sierra MK HPBT over 41.4 grains of CFE-223 in a 16.5 1/8.5 twist barrel,,,, no chrono
The load is putting 5 or 6 shots in the same hole at 75yds & I was wondering if I'm getting enough velocity out of it for long range

Signal25 · Nov 18, 2014

JBM or Strelok is free.
I have the KAC ($30) Bullet flight but it can be cumbersome.
Also the load doesn't really matter. Its best if you have the true speed to input, IMHO.

Signal25 · Nov 18, 2014

Or what about something like this to guess at velocity. Just a guess remember.
http://shootersnotes.com/Velinfo.php

Hunkyfish · Nov 19, 2014

Wow,,,,,
I'm getting 3362fps out of a 16.5in barrel according to that link Signal
Damn I gotta get a chrono before I blow something up
I wish it estimated pressure too

Just realized I screwed up the bullet weight & my reference load is thru a 24" barrel & mine is just 16.5"
So I guess a good est. would be about 2417fps
& I gotta pressure warning

Jhunter · Nov 19, 2014

Let me know if you want to run it across my magneto speed. 2417 sounds like 6.5 Grendel numbers

Hunkyfish · Nov 21, 2014

I'd would appreciate that J,,,,
maybe tomorrow or Sunday if you have time

fl57caveman · Jan 23, 2016

http://www.luckygunner.com/labs/self-defense-ammo-ballistic-tests/

Zeroed in · Jan 23, 2016

Since you are re-loading, if not imperative, you at least need to invest in a Chronograph, before a shell explodes and takes your hand/face with it. You'll know instantly if you are over-charging. I'm sure there is someone willing to loan you theirs until you can buy one. just saying, and g/l

SAWMAN · Jan 23, 2016

I have a difference of opinion. You go by the book. You do not exceed the recommended powder charge. Take under consideration your primer and type of brass used. For the "high speed" rds like the 6.5X55 figure 30fps up or down from what the book uses for bbl length. Your twist rate will not matter unless you are loading "on the edge". Especially a slower rate than in the book. And even then a 1/2 turn or even a full turn don't equate to nothing.

Your speeds and pressures will be so close that you can easily compute the drops. The reloading books will not allow you to do anything stooopid if you follow them and do not try to load right up to the MAX allowed. A medium/warm load will be more accurate than a "on the edge of blowing a primer" load anyway. The extra velocity that you will attain will be so damned small that it will really not amount to any great trajectory saving even out at the further distances.

All in all .......... just follow the book. I reloaded for years before I ever got a chrony. --- SAWMAN

kendive · Jan 23, 2016

Jhunter said:
Let me know if you want to run it across my magneto speed. 2417 sounds like 6.5 Grendel numbers

Gotta love the Magneto Speed. The pic below I am using the Magneto Speed V3 and the Green Chrony with printer to clock some .308 subs.

Capt. Dave · Jan 23, 2016

kendive said:
Gotta love the Magneto Speed. The pic below I am using the Magneto Speed V3 and the Green Chrony with printer to clock some .308 subs.

So how did the magnetospeed compare? I had the v2 and had nothing but good results.

FrankT · Jan 23, 2016

This is a 2 year old thread brought back up, Jeff is not even here anymore he is in maine working...

Zeroed in · Jan 23, 2016

I was getting info on my .204 and came across this one.

http://gundata.org/ballistic-calculator/

kendive · Jan 23, 2016

Capt. Dave said:
So how did the magnetospeed compare? I had the v2 and had nothing but good results.

The Magnetospeed does great, but I still use both. I use the Green Chrony mostly for the PCP Air Guns. Was just checking the new Vulcan .25 a while ago and getting 1010 FPS with a 30gr .25 Pellet not bad at all.

Hunkyfish · Jul 31, 2016

I'm back and getting ready to run somemore Swede thru my one armed bang bang bandits,,,, Thx for keeping this thread alive

olecarver · Jul 31, 2016

Partner if you were closer to Pensacola,,IM reading up on our forum members loads being worked up to safe shooting myself,,,I did invest in a crony a few yrs ago after talking with SAWMAN about blowing my PT-99 Taurus using the dippers in our Lee die kits,,, Luck for me 2 ways No bodily harm and Taurus warranties back then was outstanding,, Back then I would go by the Lyman and Lee Charge charts and start low and shoot lowest first then a factory round to compare ,,then go to next grain up on loading chart till the load felt close to a factory round of same bullet weight as what I wished to use,, I have brought many rounds back home and used a puller to disassemble what I knew was going to be hotter than the loads store bought,, Then as SAWMAN stated about pressures ,,I would locate powders with lower pressures on the manuals to save stress on brass and chambers,, I have learned a little GOOD Scales and a crony is nice to have,and fellow sportmen who have already achieved the goal I was seeking is a big + with this ,, GLW / the loads,,,olecarver

SAWMAN · Aug 1, 2016

Most (if not all) of the free programs on the interweb will not accomplish what the OP was asking.
You will need to find someone with Quick Load or something similar that you can actually input which powder and how much. They will spit you out a approximate pressure and speed. ---SAWMAN

Hunkyfish · Aug 13, 2016

Someone did that for me a couple of years ago on another forum Sawman,,, but Ive managed to lose track of the thread. I remember he told me I was well below max pressure & should find another node with a few more grains but I wanna be sure before I blowup a 112yr old gun.
Kinda hoping someone nearby would have the Quickload

Please read the new forum rules! REQUIRED!

Click Here: https://www.gulfcoastgunforum.com/threads/general-forum-rules-code-of-conduct.70770/

Ballitic Calculators

The #1 community for Gun Owners of the Gulf Coast States

Member Benefits:

Master

Master

Master

Master

Accuracy and precision

Master

eclectic atavist

Master

Master

Master

Marksman

6.8 SPCII Hog Slayer

Master

Master

Master

Master

Master

Master