7mm 190gr matrix bullets

[7dktaNut]

So my 7mm dakota custom build is almost done and I'm seriously considering that matrix ballistic bullets for this gun .... the b.c. 's look outstanding ! The barrel finished out to 28" and has a 1:8.4 twist . I'm thinkin about using some retumbo for this load ... i want to use this in a match coming up . Anyone got any info for the matrix 190gr reload ?
powder? bullet seating depth ? primer? etc ... Any info will help ... Thanks

 

[milo 2.0]

Re: 7mm 190gr matrix bullets

As with all Matrix bullets, it has an inflated bc number. The correct bc is .673, Berger's 180 hybrid is .684. If you can run the 190 faster than the 180, you win, if not, you'll be ahead using the 180. Run the numbers.
Can't really help with the powder, but retumbo seems like a good choice.

 

[excaliber]

Re: 7mm 190gr matrix bullets

Your asking for bullet seating depth but you mentioned your custom 7mm Dakota is about done. Didn`t you specify what throat you wanted before having it built?

 

[7dktaNut]

Re: 7mm 190gr matrix bullets

I guess what i meant by that is what r people seeing best accuracy results by seating off the lands .... at the lands or into the lands with this particular round . I know ultimately it will be up to what the barrel likes but i was wanting to know what everyone was thinkin for a good starting point . Yes my reamer is custom and is has about .200 more throat so that i can the most out of my case capacity with those super high b.c. vld bullets.

 

[7dktaNut]

Re: 7mm 190gr matrix bullets

Huh ... well that would be a huge difference in bc . By all the figuring that i have done i should be able to push those 190gr's about 3050fps . Whats the word on the berger 195 hybrid .... I've heard rumors .... Lol . I got some RL-25 .... was thinkin i might get a little more speed outta it if the speed is lacking ? What r your thoughts on this ???

 

[elmerdeer]

Re: 7mm 190gr matrix bullets

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 7dktaNut</div><div class="ubbcode-body">So my 7mm dakota custom build is almost done and I'm seriously considering that matrix ballistic bullets for this gun .... the b.c. 's look outstanding ! The barrel finished out to 28" and has a 1:8.4 twist . I'm thinkin about using some retumbo for this load ... i want to use this in a match coming up . Anyone got any info for the matrix 190gr reload ?
powder? bullet seating depth ? primer? etc ... Any info will help ... Thanks </div></div>
Max on my 7mm Dakota with Retumbo and the 190's matrix is about 74.5grs I get 2970 fps with a 25" barrel Krieger 1-8.5t accurate out to 1000yards, seating depth is good at about .030" of the lands.
Elmer