My more money than sense MK 262 Mod 1 clone development project.

[Digital_Damage]

Where are you at? It's been beautiful here just outside of Houston, but the wind as put everything on hold. I have like 5 different loads I still need to test out.

In central Florida, lots of rain and high wind all week.

[Digital_Damage]

Yeah, I was getting crazy mv fluctuations. I'll post some data later.


2.260" coal, 77gr smk, cci primers, 22.1 gr AR Comp that gave me the 6" group:

2721
2666
2656
2692
2754
2672
2683

Bazar, so far my testing has not shown any of that.

I have not shot a group larger than 1.2 from 22 - 23.2

[Koshinn]

Bazar, so far my testing has not shown any of that.

I have not shot a group larger than 1.2 from 22 - 23.2

I was getting popped primers at 22.5 gr too. Idk what's going on.

[Digital_Damage]

I was getting popped primers at 22.5 gr too. Idk what's going on.

Has to be something else then, I'm up to 23.1 with no pressure signs what so ever.

the CCI are not magnum are they?

[Koshinn]

Has to be something else then, I'm up to 23.1 with no pressure signs what so ever.

the CCI are not magnum are they?

No, regular small rifle, CCI 400. But I thought the only difference was hardness of the primer?

[Digital_Damage]

No, regular small rifle, CCI 400. But I thought the only difference was hardness of the primer?

#41/450 is a magnum.

205MAR is just a smidge harder than 205.

I have never had much luck with CCI 400's, however those issues were lots of pierced primers not popped.

The Standard Dev in 22.1 was 14 for me, They did not tighten up until 22.7, 23.1 got down to 6.

I'm going to assume you are using lake city?

[Koshinn]

#41/450 is a magnum.

205MAR is just a smidge harder than 205.

I have never had much luck with CCI 400's, however those issues were lots of pierced primers not popped.

The Standard Dev in 22.1 was 14 for me, They did not tighten up until 22.7, 23.1 got down to 6.

I'm going to assume you are using lake city?

Random brass. Lake city or pmc.

[Digital_Damage]

Updated to show final speed testing, now onto accuracy testing and case longevity testing. I'll be working up 25 rounds to do 5X5 testing and reloading the same 25 to find the failure rate.

I will also be working up 100 rounds to take with me to Northern Arizona in January to test temperature sensitivity.

[Digital_Damage]

Random brass. Lake city or pmc.

I cant say what is or what is not going wrong with your loads using this powder.

I know their are some on here that swore mixed brass does not matter much, but I have always stuck with the same lots in brass, powder and bullets with my loading.

The largest group I could muster (21.8gr-23.5gr) with these powder, cases and primers was 1.2 MOA and that was very early in testing.

[Koshinn]

I cant say what is or what is not going wrong with your loads using this powder.

I know their are some on here that swore mixed brass does not matter much, but I have always stuck with the same lots in brass, powder and bullets with my loading.

The largest group I could muster (21.8gr-23.5gr) with these powder, cases and primers was 1.2 MOA and that was in a very early in testing.

I'm going to try again later, I was getting easy sub moa with the alliance recommended load. Then I moved... Everything changed.