6.5 SHERMAN MAX

[Nevrsummr]

Nice! I would caution not to run top pressure while forming though. Much better on the future of primer pockets.

Thanks Rich. Barely started to see a faint ejector mark with RL 23 on the last round i fired.

I took the fireformed brass home and full length resized it, and loaded up 3 - 3 shot strings (.2 gr charge variance per group)where i thought i saw a flat spot in velocity. Unfortunately that didnt pan out for me as now that i have fireformed brass i pulled the bullet back .024 off the lands and the pressure changed slightly. Couldnt get a good ES. Results attached

 

[GregH118]

Just wondering if this crude on the brass Is normal

 

[Deleted member 109523]

look for a hairline crack in the middle of that case. that happened to me fireforming a 280 AI, and accually had one spit in half.

 

[GregH118]

I went to the range today shot 20 rounds half of them looked like that the other half were clean brass

 

[bamban]

So Rich, can you do the work on a 700 LA magnum bolt?

You are from SoTex, try Pete Pieper at Hempstead.

Precision Barrel Work - Custom Gunsmithing for Benchrest, Hunting and Varmint Rifles of Highest Quality

Precision Barrel Work - Custom Gunsmithing for Benchrest, Hunting and Varmint Rifles of Highest Quality

He did this bolt for the 30 Nosler. It was a 473 type bolt. Not only he opened the face, he installed the Sako extractor, bushed the firing hole , and turned down the firing pin tip to 0.062 to complement the new firing pin hole.

I did the rest of the action work.

 

[Deleted member 109523]

I went to the range today shot 20 rounds half of them looked like that the other half were clean brass

I don't know what I did wrong with mine, maybe a head space issue, or my die was very tight and I created a fault in the case.
I shot 2 that looked like that, and the third came out in two pieces. the first two had hairline cracks. switched dies, never had that problem again

 

[GregH118]

What dies were you using what did you switch too

 

[Deleted member 109523]

What dies were you using what did you switch too

They were Redding dies, and when I sent the back, they verified they were too tight. I went with hornady's. But this was for a 280 AI.

I shoot three different Shermans, and they use whidden and Forester dies. Never had a problem.
Might be sizing too far. ( bumping the shoulder too far back)

 

[Deleted member 109523]

If it is indeed cracked. But I'm no expert, I've been doing wildcats for only 2 to 3 yrs now

 

[GregH118]

I'm Shooting a 6.5 max hornady dies I am bumping shoulder 2 thousands

 

[Deleted member 109523]

hmmmm I'm sure Rich can help. All my Hornady dies are spot on

 

[GregH118]

Does this mean my shell is not sealing off in the chamber?

 

[elkaholic]

Does this mean my shell is not sealing off in the chamber?

It looks like gas blow by. Is that a fire forming load.
what is the load?

 

[GregH118]

Not fire forming once fired 57 grains vit N165 156 Berger 20 thousand off lands