My 338 Lapua Magnum by Cloud Peak Gunworks

[C.O. Shooter]

Group one: 55 Degrees, 28.74 Baro.

Group two: 60 Degrees, 28.74

565 Yards, No wind, Everything was the same as far as bullets, powder, case, and primers.

9.75 Moa U/.5 Moa L (2842 fps)

Confused why one group was dead nuts center and my second was to the left.

 

[Timber338]

You are shooting the NF ATACR so I doubt the scope is shifting POI... are you sure the wind didn't shift very slightly between groups? I know you said no wind, but maybe??

 

[C.O. Shooter]

My load quest continues. I am to the point where I believe I am splitting hairs. My last rounds were at 2.998. I thought ok .005 +/- either way and see what happens.

500 Yards/8 MOA (2842 fps)/.5 MOA L/28.20 Baro/78 degree/76 RH/Slight head wind. Center square was 2.5"x2.5"

Removed the .5 MOA L.

Constructive Thoughts or Ideas!
Thanks

 

[Swatman05]

My load quest continues. I am to the point where I believe I am splitting hairs. My last rounds were at 2.998. I thought ok .005 +/- either way and see what happens.

500 Yards/8 MOA (2842 fps)/.5 MOA L/28.20 Baro/78 degree/76 RH/Slight head wind. Center square was 2.5"x2.5"
View attachment 104371

View attachment 104372

Constructive Thoughts or Ideas!
Thanks

I would definitely say when you increased to 3.003" BTO the grouping seemed to improve. What if you used 3.003" BTO as a baseline and go +- .005 from there?

 

[Swatman05]

My load quest continues. I am to the point where I believe I am splitting hairs. My last rounds were at 2.998. I thought ok .005 +/- either way and see what happens.

500 Yards/8 MOA (2842 fps)/.5 MOA L/28.20 Baro/78 degree/76 RH/Slight head wind. Center square was 2.5"x2.5"
View attachment 104371

View attachment 104372

Constructive Thoughts or Ideas!
Thanks

I would definitely say when you increased to 3.003" BTO the grouping seemed to improve. What if you used 3.003" BTO as a baseline and go +- .005 from there?

 

[C.O. Shooter]

3.003" puts me .005 off the lands.

 

[Swatman05]

3.003" puts me .005 off the lands.

True.. I bet you'll get it figured out soon! Been follwing this thread for a long time now.

 

[C.O. Shooter]

Thanks, <64 Days to Wyoming.

 

[Swatman05]

Thanks, -64 Days to Wyoming.

Awesome! I can't truly hunt until next year. I'm currently in Aviation Maintenance School and I have a little over 6 months left. All my time is being devoted to studying and getting ready for tests so I can be certified to work on aircraft.

 

[wildcat455]

I detect hesitancy to be close to the lands, your call. You know your rifle. I don't remember your 91 grain load of H1000 being in pressure or close to it. Maybe try 5 @ 3.005" for a .003" jump, and 5 @ 3.001" for a .007" jump? One of those should tell you something, even if it's re shoot 3.003"

 

[C.O. Shooter]

600 Yards/10.75 MOA (2842 fps)/No Wind Hold/28.41 Baro/55 degree/66 RH. 4" circle.

This was a reshoot from my last outing. Going with 3.003"/.005 off. For my trip. Four shot group measures under 3" and has the least amount of vertical.

 

[C.O. Shooter]

2018 Wyoming Whitetail. Just under 300 yards. 7-10 mph winds. 2.75 MOA/.75 MOA L.

 

[Timber338]

Nice shooting!

 

[StealthOwl]

Nice rig!