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Any Thoughts On Why I Have To Bump Shoulder of New Alpha 6 ARC Brass For Gas Gun .004”?

If the thing closes on a go gauge then the chamber isn’t “too short.”
Your numbers look alright compared to the reamer print and your relative fired vs sized. They all get smaller and are all smaller than the reamer print.
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Is it dirty? A bit of build up could be enough to trick your feel.
Grab a box of factory and see if you have the same issue with hornady brass?

🚨 NFA language BACK IN!!! (Post #121) HPA/Short Act Update 7/1 ☎️ these 💩 and yell at them more

Agreed, but it will be even bigger theft if we let the tax cuts expire. 68% bigger. Do we want that?
The US government is bringing in about $5.49 trillion in revenue. We don’t have a tax problem. We have a spending problem. If taxes go to zero, you will still be losing because they will print more debt and devalue what you’re making. We are payIng “tax” in a bunch of ways besides personal income tax. They will always give us a carrot to pass the pork that they want.

.223 - 5.56

How is the Starline brass? I have heard good reports.

I don't know if I got my spreadsheets off of my old computer that went tits up or not, but I tested 20 random pieces of Starline brass in 6.5CM, Grendel, and .223.

Base to shoulder datum, OAL, and primer pocket depth on virgin cases were all in the .003 ES and .001 SD range. H2O capacity was all within about .4gr ES and .1 SD.

Lapua tested better, but I'm perfectly happy to run Starline in most of my rifles... especially autoloaders.

Just watch the case capacity of Starline...it is significantly less than Lapua or LC in .223, and Lapua/Hornady in the Grendel. You'll run into pressure a full grain less than book max in a lot of cases.

PortaJohn

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Yank their broadcast license. Permanently.

LOL. this is not going to work out like they think it will. if its a user supported app, its going to get crushed by false sightings and reports all over the place as anyone can download and use it. False ICE raids everywhere. or are they?

🚨 NFA language BACK IN!!! (Post #121) HPA/Short Act Update 7/1 ☎️ these 💩 and yell at them more

Making Trump's earlier tax cuts permanent, for one thing. The biggest thing...
They can cut taxes to zero and you are still going to pay. They will usher in a sales tax to include a luxury tax. Along with the inflationary tax from deficit spending.
I'm just a Billy from the hills and know bad trade when I see it. It's a pig in a poke.

All the world is a stage