6.5 Creedmoor

[Ann Ominous]

I highlighted what I’m concerned with

 

[Simonsza1]

Still doesn’t seem to be bad to me from the pics. Definitely be your own judge obviously. I’ve never used that powder so maybe some one else can chime in if that seems to be a normal load or not.

 

[Ann Ominous]

It’s below max from Hodgkin by a full grain
And 1.4 below max from Hornady

 

[Ann Ominous]

I’m just new and don’t know what’s too much sign

 

[Slides]

I'd say those velocity variations are equal within sample noise, are you using a lab scale or beam to finish the charge to target?

What projectile & barrel lenght? What powder?

If that's "old" winchester brass should be fine, the new stuff seems to be hard but thinner in the body, lot of people getting cracking with low fire count on new stuff but the old ones seem to last a long time. If it's the older brass it may get light ejector prints at reasonable loads, I can see faint ejector marks on my 6br norma brass from about 3 grains under what everyone runs, my velocities line up pretty much exactly with all the 6BR/Accurate shooter load guides too.

Primers look fine. Extraction ok?

 

[Ann Ominous]

Everything runs well ez and smooth just prints on the face of the brass. It is new brass (bought win ammo and reloaded it)

 

[Bbracken667]

I'd say those velocity variations are equal within sample noise, are you using a lab scale or beam to finish the charge to target?

What projectile & barrel lenght? What powder?

If that's "old" winchester brass should be fine, the new stuff seems to be hard but thinner in the body, lot of people getting cracking with low fire count on new stuff but the old ones seem to last a long time. If it's the older brass it may get light ejector prints at reasonable loads, I can see faint ejector marks on my 6br norma brass from about 3 grains under what everyone runs.

Primers look fine. Extraction ok?

Bear in mind that headspace can also be a problem separate from charge weight.

 

[Ann Ominous]

Components:
Br2 primer
Accubond L.R. 142 grain
Nickel plated win. Brass
Staball 6.5

Components

 

[Ann Ominous]

22” barrel

 

[357Max]

22” barrel

Ditch the polymer mags for binder less MDT or accurate AICS. That will allow up to 2.960 mag fed.

As for the load I don't have much to offer. Never loaded Winchester brass or those 142's for the 6.5C. So not sure how Win case capacity compares to Lapua etc.
Anecdotally though Win brass in other calibers I've loaded has pretty hard heads & BR2's I believe have the thicker cup. Or in other words that combo may not show pressure signs as early as say Hornady brass with Federal 210's.

I don't see cratering on the primers, they don't look very flat, & you said bolt lift was normal. All good there.

With 6.5 Staball I haven't been able to achieve as low SD as I can with other powder choices such as H4350, RL16, RL15.5, N555

I don't think you ever told us the speed you got or what rifle/barrel you've got. That is an important piece of the equation.

 

[DubfromGA]

Last winter I was using some left over Prime brass just to break in my newest 6.5CM build, but I was not happy with the SD numbers. This was with 140 ELDMs and 41.7 gr of H4350, .035” jump for 2,750 fps. SDs was in the teens. Switched to Peterson SRP brass and immediately the SDs dropped like a rock. Last time I chrono’d my SDs with the Peterson brass load was 2.7 fps from a 10-shot string.

Do you recall which SRP you used ?

 

[max1840]

Looking at your pic's it seems the bolt face is rubbing the case face which as @Bbracken667 stated could be a headspace issue

 

[Ann Ominous]

Ditch the polymer mags for binder less MDT or accurate AICS. That will allow up to 2.960 mag fed.

As for the load I don't have much to offer. Never loaded Winchester brass or those 142's for the 6.5C. So not sure how Win case capacity compares to Lapua etc.
Anecdotally though Win brass in other calibers I've loaded has pretty hard heads & BR2's I believe have the thicker cup. Or in other words that combo may not show pressure signs as early as say Hornady brass with Federal 210's.

I don't see cratering on the primers, they don't look very flat, & you said bolt lift was normal. All good there.

With 6.5 Staball I haven't been able to achieve as low SD as I can with other powder choices such as H4350, RL16, RL15.5, N555

I don't think you ever told us the speed you got or what rifle/barrel you've got. That is an important piece of the equation.

42.3gn-2662
41.9-2648
Aero Solus in KRG Brovo

 

[Ann Ominous]

Looking at your pic's it seems the bolt face is rubbing the case face which as @Bbracken667 stated could be a headspace issue

I’ve got go/no go gauges I’ll check it out

 

[357Max]

I’ve got go/no go gauges I’ll check it out

Since your new I don't want to skip the obvious. It's not just chamber head space. Do you have a comparator to check the shoulder bump on your resized vs shot brass? This is important. You can't just screw the die in till the shell holder is contacting and expect all to be well. .002-.004 shoulder bump is what you want. If the shoulder clearance gets to high about .010+ you'll see false pressure signs from the case head slamming back into the bolt. This is especially true with actions like the Solus that have spring plunger ejectors. Those ejectors push the case forward till the shoulder contacts. Extra or excessive shoulder bump also reduces brass life because the base of the brass stretches out to meet the bolt (big contributing factor to early case head separations).

 

[Ann Ominous]

Yes I have a competitor set. They’ve all been bumped back. I believe to 2660 (off memory I’d have to check my notes) I’ve also been using the ogive comparator for overall length as opposed to going tip to butt.

 

[Ann Ominous]

That is a good point about the ejector it makes sense but probably would have missed that if that was my problem

 

[Rob01]

I would keep shoulder bump as low as possible in the .001-002” area. All mine is .001” and functions great.

 

[Ann Ominous]

I think I bumped mine .003 so that they all measure the same. Some were at 61 some at 63 so I went to 60

 

[Ann Ominous]

1.560” per the comparator

 

[ECK]

Do you recall which SRP you used ?

CCI-400

 

[Ann Ominous]

Ditch the polymer mags for binder less MDT or accurate AICS. That will allow up to 2.960 mag fed.

As for the load I don't have much to offer. Never loaded Winchester brass or those 142's for the 6.5C. So not sure how Win case capacity compares to Lapua etc.
Anecdotally though Win brass in other calibers I've loaded has pretty hard heads & BR2's I believe have the thicker cup. Or in other words that combo may not show pressure signs as early as say Hornady brass with Federal 210's.

I don't see cratering on the primers, they don't look very flat, & you said bolt lift was normal. All good there.

With 6.5 Staball I haven't been able to achieve as low SD as I can with other powder choices such as H4350, RL16, RL15.5, N555

I don't think you ever told us the speed you got or what rifle/barrel you've got. That is an important piece of the equation.

What kind of modifications do I have to do to the bottom metal?

 

[357Max]

What kind of modifications do I have to do to the bottom metal?

Not a thing. Look at your polymer mag, it should say AICS on there somewhere. As long as your rifle takes AICS mags, any Accurate or MDT (binderless) AICS will plug and play.

 

[Ann Ominous]

I thought you had to modify the reciever

 

[Ann Ominous]

I’ll buy one try it out I’m going to try out an aw too