Trying to understand Barnes LRX BC

[wildcat284]

I had 15 of the 6.5mm 127gr LRX arrive by courier from Gunworks, along with the same quantity 130gr Swift Scirocco's, just to have a play with in my 6.5mm SAUM.

First thing that struck me with the Barnes was the length - these are a looong bullet (obviously due to all copper construction). I measured with my digital vernier, they are 1.4 inches in length. They are longer than the Swift's. They actually look like a half decent projectile - boat tail is quite long (I guess close to a Berger VLD maybe?) However from what i've read Barnes calculate their BC values at 300 yards (0.468).

Would it be fair to assume that their BC value when measured the same as other manufacturers bullets of the same shape / weight would be around the 0.550 mark? - the Scirocco's are .561

Cheers,

Michael.

 

[wedgy]

Yes, it seems very low compared to others and Litz gives it a 0.446, a little lower than what Barnes advertises. For comparison the Cutting Edge 130 lists a 0.550 and the Hammer 124 lists 0.245 G7 = ~0.480 G1. They don't seem as long and pointed as the others, but they shoot very accurately, just not that efficient.
I run them at 3030fps out of my 6.5x284, I hit pressure with these sooner than an equal weight lead bullet. I think the Cutting Edge is a bit softer material.

 

[wildcat284]

Thanks Wedgy

I presume you shoot them because of California laws on lead free?

How have you found they perform on Deer? I got a sampler pack of 15 to try loads with rather than buy a box and find they don't work in my rifle. When working up loads, how many grains below a conventional projectile of the same weight do you go and do you find that the grooves in the shank help reduce pressure?

 

[wboggs]

Grooves decrease pressure and fouling. Most accurate for me when seated about 0.06 from rifling. I have gotten some 1/2 moa groups with hunting loads. Terminal performance has been excellent.