Factory Ammo v Handloads

[martin_b]

Interesting comparison i think. 

The group on the right 5 concecutive handloaded  140g 6.5CM  the string on the left 5 S&B factory 140g ammo 

Shot at 1000yards  with about a 8mph breeze. Just put in scope values in from Strelok and used the same aim point for every shot.

 

 

 

[Dr. Strangelove]

Good shooting! Did you get a chance to compare the muzzle velocity of your handloads vs the factory?

[martin_b]

Now funny you should say that.. I didnt, but I did put the scope elevation values back into Srelok and got it to calculate the speeds S&B 2653 f/s  Home made 2634f/s.  So mine are slower but needed 9.5mils of evevation where as the S&B needed 11mils (plus or minus a bit!)  The big difference is I'm using Nosler RDF which have a much better G7 drag coefficient.

 Not a very scientific experiment  but interesting..

PS:  Quickload gives a predicted velocity of 2725, Gordons, 2660.  ( thats with a lot of default values but I plan to refine the data of the long weekend)

 

Edited April 2, 2021 by martin_b
Home made speed corrected as wrong temp and pressure in Sterlok