77 SMK & 8208 XBR results

[tripletapjake]

So I worked up a new 3Gun load with a 77 SMK and IMR 8208 XBR for a 16" JP CTR-02. The velocity was not as high as I was hoping but the results were amazing. The load is shooting less than 1 MOA, it has an extremely light recoil pulse with zero pressure signs and incredible consistency.

I am sure my group could have been much better with a bit more magnification and a more precise reticle. Most of the group size was aiming error as the Leupold TMR-D reticle in the Mark 6 took up the entire 1" diamond target at 100 yards.

Here is the load:

77 SMK

23.0 grains of IMR 8208 XBR

LC Case

CCI Small Rifle Primer

COAL: 2.255"

Barely kissed the case mouth with a Lee FCD

Here is how it turned out with the chrono with a 20 shot sample out of the 16" CTR-02:

Average: 2534 fps

High: 2553 fps

Low: 2521 fps

ES: 32 fps

SD: Only 9 !

8208 XBR is an extremely temperature stable powder so I should have very little shift from match to match..... regardless of where the match is located.

With a 50 yard zero, the bullet drop is still relatively flat and corresponds with the TMR-D reticle pretty closely (approximate values):

50 zero

100 + .3 mil

200 - .18 mil

250 - .54 mil

300 - .95 mil

350 - 1.4 mil

400 - 1.9 mil

450 - 2.4 mil

500 - 2.9 mil

For all intensive purposes, this should be a good 3Gun load.

Edited April 16, 2013 by tripletapjake