Changing Ballistics Program Information for Rifle

[Hgold]

Sorry mods... wasnt sure where to put this one

I changed my regular 223 bullets for a different make, just for something new really. So got myself some federals. I downloaded the ballistics program and Im in the middle of printing out charts and information when I happen to spot that all the results in the program were gathered from a test rifle with a 24inch barrel. Only problem is my barrel is 20 inches.

Anyone know any formulas or anything on how to make that 24 inch barrel information more applicable for my 20 inch barrel?

THanks

 

[shibby575]

Re: Changing Ballistics Program Information for Rifle

you need to chrono your load

 

[The Mechanic]

Re: Changing Ballistics Program Information for Rifle

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: shibby</div><div class="ubbcode-body">you need to chrono your load</div></div>
I second that. It is all about exterior ballistics once it leaves the barrel. Length don't make a hill of beans. It is all about ENV, BC, and MV