The Firing Line Forums - View Single Post - Switching to Barnes Bullets - Do velocities tend to be up/down with same charge

300magman · August 9, 2012, 03:25 PM

I'm having a brain fart, I can't remember if velocities tend to go up or down when switching from a conventional bullet (in this case a speer 168gr 30 cal.) to a barnes bullet (168gr ttsx) when using the same charge of powder.

Don't worry I'm not just going to swap bullets without working the load up; and I'm not loading very near to max.

I just happen to know what approximate velocity I want to see and I'm looking for an idea of what powder charge to load up to to achieve it. I have already shot a ladder test with the speer bullet and know exactly what velocities 1gr increments of powder produce.
I will just estimate from that test if anyone can give me the general trend on making the switch to barnes.

(My particular brass's case capacity and the OAL I'm loading too are both significantly different from the book recipies. . .so they aren't accurate at all in velocity prediction for this rifle)

August 9, 2012, 03:25 PM	#1
300magman Senior Member Join Date: September 12, 2008 Posts: 714	Switching to Barnes Bullets - Do velocities tend to be up/down with same charge I'm having a brain fart, I can't remember if velocities tend to go up or down when switching from a conventional bullet (in this case a speer 168gr 30 cal.) to a barnes bullet (168gr ttsx) when using the same charge of powder. Don't worry I'm not just going to swap bullets without working the load up; and I'm not loading very near to max. I just happen to know what approximate velocity I want to see and I'm looking for an idea of what powder charge to load up to to achieve it. I have already shot a ladder test with the speer bullet and know exactly what velocities 1gr increments of powder produce. I will just estimate from that test if anyone can give me the general trend on making the switch to barnes. (My particular brass's case capacity and the OAL I'm loading too are both significantly different from the book recipies. . .so they aren't accurate at all in velocity prediction for this rifle)