Weaver/Blackhawk make 1/2” risers. I have a couple of them on ARs. They are full length on an upper.

“Hightower added that he is pushing Greyhound to end its policy allowing guns across state lines and urging Georgia Governor Brian Kemp to tighten gun laws to keep firearms away from young people.”

Are you sure the bullets measure .2638"/.2639".

Are you sure your mic or measuring tool is properly calibrated and reading correctly?

I ask not to be offensive at all but more often than not what you measure and what you use vs what tools the manufacturer has and uses the measurements are not even close.

Think of this for a minute... let's say your reamer actually cut undersize by a couple/few tenths. Let's say the reamer actually cut the throat at .2642". Then let's say your bullets are actually measuring .2642". Your size on size. Bullets could be in spec but the throat is undersize and causing your issue.

I don't recall or know offhand the actual spec. Hornady makes the 140 ELDM's to. Usually a bullet maker has a standard spec for a given bullet. I'm guessing here so bear with me and don't call Hornady and say... Frank said So!

Let's assume Hornady makes those bullets to a min spec. of .2640" with a tolerance of +.0002". That could give you bullets in the same lot measuring from .2640" to .2642".

Even if the reamer is spec'd at .2645". Now let's say the bullets measure .2642". That doesn't leave a whole lot for clearance per side. Total it leaves you only .0003" total clearance on the diameter. Your numbers start to stack and presto... you have issues.

I've seen it with 300AAC as well. The clown that spec'd the chamber spec'd the throat at .309" diameter. Well guess what they did.... they spec'd the bullet could be as large as .309" diameter and I've actually measured reference ammo where the bullets measured .309" diameter. Then a brand new reamer we had cut the throat at .3088" to .3089". Guess what? The rounds wouldn't go into the chamber. The rim thickness of the case actually stuck out of the chamber around .050"! Pressure jumped 6k psi on a pressure test barrel and velocity jumped like 75fps. on the spec reference ammo.

Ttt

Sold

patriot07 said:

Looking at the end of case picture, that seems like where the copper is catching. You can see flakes of it on that edge.

This was a new box of ammo last night. Maybe the bullets were just slightly larger in this box enough to catch? I looked up 6.5CM spec and the .2645 is correct diameter for the space past that lip, and if the bullets are .2638-.2639, they shouldn't be scraping around the entire diameter like that....wonder if it was a slightly worn reamer and we are paying the price a decade later?

ETA - I cleaned and cleaned and cleaned it and it appears maybe there was a light carbon ring. I took a few more new rounds and now the marks are still there, but lighter. The force to close is still there, but lighter. In the bore scope, the black by the end of the case is significantly lighter. Maybe @Terry Cross was correct that it's a couple things - a slightly tight freebore combined with a light carbon ring...

Of course I don't recall other rifles making any mark at all when I chamber a round so maybe there is still something else going on?

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To the question of the throat diameter being .2645" and your bullet diameter of .2638"/.2639".

How many chambers has that reamer cut? The first thing that goes on a reamer is the throat. Even if you use a roughing tool when you go to finish chamber that finish reamer the throat area of the reamer is always cutting.

I've seen brand new reamers where they were not ground correctly or should I say not to the correct dimensions. Or it can be ground to the correct dimensions but will not cut to spec.

We have multiple caliber reamers where the throat area is a tight spec. In some cases we will or have to ball gage this area for inspection for ammunition test barrels. There is a range on the depth that the ball gage has to be in. Also we will take live rounds (box ammo) and drop it into the chamber by hand and check for it sticking and or leaving any marks on the bullet. If the ball gage is out of spec and or leaving marks on the bullet... either the reamer is going or if it's a brand new tool it wasn't ground properly. Pretty easy check to do. We've even taken reamers and had them checked/measured on a CMM machine to figure out what the heck is going on.

This is another reason why we don't use reamers from a rental place. No one has ever been able to tell me... how many barrels has it been used in? How has it been treated? Was it used in a c.m. steel barrel or a s.s. steel barrel? When was the last time it was resharpened?

How many times it was used? Yes it can make a difference. There can be a build up on the tool and it can cause it to cut differently.

Later, Frank
Bartlein Barrels

Jingoist said:

...which is ironical, given the entire woke left is comprised of (ugly) white "chicks."

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White liberal women have bought several lies to the destruction of society. Feminism tells them that they are equal (superior) to males. Despite all evidence, they hold that they can perform at male levels in stress and even physical power. It is lunacy. Wokism is diametrically opposed to “women” in its embrace of “trans” ideology but somehow the machinations are performed and feminists support fucked up men “becoming” women. Anti-family ideology differs slightly from feminism and they have bought that too. From “gurlpower”, “I don’t need no man”, “the patriarchy oppression”, “abortion is a right”, “I got 3-7 baby daddies”, and dressing like whores….

As Fd up as Shaquasia is, Amber is in reality a much worse element of society.

AMG04 said:

... and what they don't break, they sh*t on!

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Jesse who lives down the road sells me aged cow compost. Last year my old red F250 was the object of ire of a couple of his cows and they just proceeded to put a few dents in it for no particular reason at all.

At least their poop is useful for gardens and certain fungi love it

GreenGO Juan said:

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Sonny Crockett would have smoked both of those clowns

Hawkins rings or unimount

As a reloader for over 50 years I would guess that this started due to flat trajectory helping get hits at longer and unknown ranges. Prior to LRF’s and scopes that could accurately be dialed for range a 400 yard hunting shot was considered very long range. So, limits were pushed to make up for mis guesses of range.

Phriday

Maurygold said:

1. Most of us have shot thousands of rounds. Shooting is a skill - shoot more and it will improve some.

2. You’re most likely not letting the rear bag do the work. You need to put zero input into the gun other than the trigger (don’t grip the gun with trigger hand)

3. Those are actually not bad for hornady - 90% of us are using custom ammo

4. 90% of us are using custom guns - see #3

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This above.

And

Have another shooter get behind the rifle to see how it groups for them.

232593 said:

@Frank Green any thoughts?

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Tough call! The more you magnify you see stuff that might not be an issue.

The other hard part about looking at your pic's is.... "what did it look like before the gun had any rounds fired thru it?"

How many rounds are on it?

Is it shooting good?

My one guess is the carbon ring is not causing the issue of leaving marks on the bullet. The throat is undersize on how the reamer cut.

Bump

Barneybdb said:

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Unless I miss my guess, that little demon is a M60 357 Magnum. I bought one in 2000ish. I finally changed out my front sight a couple years ago to a taller blade so it shot to point of aim (and some better micarta grips). If you don't hit what you are aiming at, you will probably still set it on fire.

A miniature donkey. Cute until it kicks you....

Lever evolution with 87gr Bergers at 2950fps for my hunting load this year.

My steel load currently is with n150 and 100gr Sierra tipped game kings for 2520fps. Raven Rock had this bullet on sale for like 25 cents a piece so I bought 1000. When I'm through with them hopefully the 95gr tipped match kings are back and I'll switch.

Cfe223 works well with 95gr SMKs for 2710fps probably my favorite combo.

6mm ARC for me with my 18" AR lives in the 87 to 95 grain range of bullets, I have a couple 6 creed for heavier and faster.

I use Hornady and Starline, the starline brass is fine but I think I'm on my 5th or 6th reload of it and starting to get chewed up. If I was shooting a bolt gun I'd have alpha. I'm not good enough with an AR to need premium brass in it. ARs are tools for me and sometimes that brass gets left in the desert if I'm chasing something.

What happened to PMclaine? Phone broke? Iirc he had no home computer.

BJames said:

I’m not one of the vintage experts around here, by far, but were there rifle fired grenades in WW1? Either way, cool piece of history!

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Heavily used in ww1 because you could lob grenades I to trenches well beyond throwing range



This is a British “Mills Bomb” with a rod attachment as a launcher in WW1.

Doing conflict archaeology in Combles, France, c.2012, we found loads of these in one small potato field!

OP, have you thought about sending the pix to Ian McCollum at Forgotten Weapons? He loves this stuff!

In terms of “non-military” applications… could be for holding cartridges for a harpoon gun… like a Greener. Would make grabbing the cartridge easier in a pitching boat. Or for a veterinarian or farmer to use in a “Humane Cattle Killer” or similar device.

I would love to know its exact use! It is very cool!

Sirhr

While much load data is watered down, some isn't. A couple of Alliant's maxes are pretty damn destructive on brass. I never thought I'd toast Lake City 5.56 brass on the 3rd load...but here I am.

One is also assuming that the loads posted by forum members on various sites are true. I would suppose that anywhere from a quarter to half of them are fabricated.

It started about 8-10 years ago when guys began trying to 'out velocity' each other. The practice is now very much like trying to post the tightest groups. As soon as you add the element if competition to it, you have dudes who are willing to sacrifice integrity and/or safety for the accolades of strangers on an internet forum.

There are a few YouTube channels even where guys do almost nothing but live on the edge of pressure and shoot crappy 3-shot groups. At least those ones are usually honest regarding velocity... they're just sacrificing brass for the sake of "like, share, and subscribe".

TTT

168BTHPM said:

Hey @Barneybdb talks funny and likes succulent meat with a beautiful glaze too.

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These two have held each others meat.

The thing is, mostly none of us have pressure testing equipment, and by the time the brass starts to cry uncle we are generally way over pressure.

This is why I like to proof out a new load on the same brass I did load development with by running that 50 peices to death. It Let's me watch the primer pocket long term and see if it's a load I want to go into production with. Let's me check the die setting and compatibility with the chamber long term also.

I personally wouldn’t disgrace a nice 700P with a POS optic like a Steiner…