6.5 CM loading help

[C-grunt]

Im loading ammo for my 6.5 CM with a 22 inch Gradous barrel.

Loads tested were 41.5 grain and 42 grains of H4350
Each load was a Hornady once fired case (through my rifle), a 140 ELD-M, Federal Champoin large rifle primers, Full length resizing, and loaded to 2.8 COAL. All done with a Lee hand loader

The 41.5 grain load shot better accuracy but it had a SD of 19.

2020-01-13_03-25-21 by chase ditwiler, on Flickr

I yanked one on this group but it still shot a decent group

2020-01-13_03-31-10 by chase ditwiler, on Flickr


The 42 grain load shot lower SD of 12 but would overall shoot a little less accurately and would throw a flyer every so often.

2020-01-13_04-35-42 by chase ditwiler, on Flickr

2020-01-13_04-36-00 by chase ditwiler, on Flickr

This 42 grain group shot better but I had a primer that wouldn't ignite so it's only a four shot group (last of my loaded rounds)

2020-01-13_03-24-38 by chase ditwiler, on Flickr





Now I fully acknowledge that the flyers could have been me but those shots felt good and I was shooting off a concrete bench using bags. All the ammo was loaded at the same time and Im not sure why the flyers would be so far off. Im still fairly new at reloading so what should I be looking for to either improve the SD on the lighter load or get rid of the flyers on the hotter load?

[hotrodder636]

Have you tried a load somewhere between 41.5 and 42? I go in 0.3 increments when developing my loads....and when close may tweak with 0.1-0.2 gr.

[C-grunt]

Have you tried a load somewhere between 41.5 and 42? I go in 0.3 increments when developing my loads....and when close may tweak with 0.1-0.2 gr.

This was my first test.

[Pappabear]

what was your velocities? Looks like you are good to go depending on velocity.

PB

[C-grunt]

what was your velocities? Looks like you are good to go depending on velocity.

PB

2765 and 2770

[Pappabear]

2765 and 2770

That works

[gunnerblue]

My suggestion would be to switch to Lapua small rifle primer brass- cut my group size almost in half compared to the Hornady (sub half moa for ten rounds). 42 grains H4350, Fed small rifle match primer, full-length size, 2.800” OAL with a Nosler 140 grain RDF, 2740 fps

[jack crab]

What's your purpose or intended goal for reloading?

[Send it...]

I ended up at -

143ELD-X

Lapua SP brass and 42.7 gns from my OCW testing. Rem SR BR primer.

I chose 1% increments.

25” Bartlein @ 2840

Shoots extremely well. Good luck to you.

[lsllc]

How did you arrive at one or the other. Where they just random loads or did you develop this loads?


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