6.5 Creedmoor - Hornady Comparator Gauge - Which One ?

[RED DIRT]

Fella`s,
i`m finding mixed comments on which Hornady Comparator gauge should be used to check 6.5CM shoulder bump.

Some say use the C.375 and some say use the D.400
There is nothing on the packages that say 6.5 Creedmoor, so which one are people actually using ???

Thanks guys

 

[RS243]

According to saami case drawing the datum line is at .400

 

[marchx]

i use .375

 

[Kracken McGraw]

I use the D .400 one, but someone will tell you I’m wrong shortly.

 

[Rob01]

Use the D .400 for the Creedmoors. It's the one I was told to use by the guy who created the round and I have used it since the round came out. On the Hornady site it says the .375 so you could probably use that also as it's just a reference point.

Lock‑N‑Load® Headspace Comparator & Anvil Base Kit - Hornady Manufacturing, Inc

Lock‑N‑Load® Headspace Comparator & Anvil Base Kit Lock-N-Load® Headspace Comparator The Lock-N-Load® Headspace Comparator extends brass life, improves accuracy, and enhances safety. The gauge measures...

www.hornady.com

 

[47WillysGuy]

Use one or the other, not both. Confusion factor. I also use the 0.375.

 

[RED DIRT]

I tried both today, and measured 100 cases that i have already bumped and sized. Other than where it`s landing on the shoulder, there was hardly any noticeable difference between the 2 gauges when zero`d out.

At this point, i might as well just keep using the C.375 and call it good enough. My rifle and my reloads are well under a 1/2 in at 100 yards. So i must be doing something right, lol.

 

[piie]

It doesn’t matter, it’s a comparative measurement, not absolute, just don’t mix it up- choose one and stick with it. As long as the comparator goes freely over the neck and touches somewhere on the shoulder, you’re good to go.

 

[bozo699]

It doesn’t matter, it’s a comparative measurement, not absolute, just don’t mix it up- choose one and stick with it. As long as the comparator goes freely over the neck and touches somewhere on the shoulder, you’re good to go.

Exactly!… for years I used a pistol case and after that a barrel stub then I got fancy and bought comparator tools.
Wayne

 

[RED DIRT]

So, i looked up the actual specs, and it appears that they are using the .400 spec for the measurement.
Maybe i will start using the D.400 gauge from now on and see how it goes.

 

[Rob01]

As mentioned it doesn't matter much as long as you use the same one all the time to get your bump measurement. You can switch to the .400 if you wanted. Won't hurt anything.

 

[RED DIRT]

As mentioned it doesn't matter much as long as you use the same one all the time to get your bump measurement. You can switch to the .400 if you wanted. Won't hurt anything.

Agreed
But as long as it says its measured at the .400 part of the shoulder on the print, then that`s what i will use as a reference from now on. Less confusion when i go back to look it up later.

 

[Conaso]

If you don't have the SAMMI specs...

Hornady states: “To determine the proper bushing diameter for your cartridge case, simply add the neck diameter and the shoulder diameter and divide that number by two. Use the bushing closest to that number.” Hornady offers five: .330″, .350″, .375″, .400″, and .420″.

 

[Dave M.]

Fella`s,
i`m finding mixed comments on which Hornady Comparator gauge should be used to check 6.5CM shoulder bump.

Some say use the C.375 and some say use the D.400
There is nothing on the packages that say 6.5 Creedmoor, so which one are people actually using ???

Thanks guys

D

 

[Mike TackleBerry]

 

[kochie]

Agreed
But as long as it says its measured at the .400 part of the shoulder on the print, then that`s what i will use as a reference from now on. Less confusion when i go back to look it up later.

i use 400 on the 22 CM same case

 

[RED DIRT]

View attachment 1566970

Where did you come up with that chart. I`m looking at the back of the package that my comp gauges came in, not a one of them say 6.5 Creedmoor on it. Especially the C.375 package. Seems the 6mm Creedmoor isn`t on your list here, and it seems it should be, since its the same cartridge as the 6.5CM, just a smaller neck size in the 6mmCM.

 

[RED DIRT]

D

?

 

[Rob01]

Where did you come up with that chart. I`m looking at the back of the package that my comp gauges came in, not a one of them say 6.5 Creedmoor on it. Especially the C.375 package. Seems the 6mm Creedmoor isn`t on your list here, and it seems it should be, since its the same cartridge as the 6.5CM, just a smaller neck size in the 6mmCM.

That's why it's not on there. Same cartridge. Also that is on the Hornady site. I thought I linked it earlier.

 

[Rob01]

Use the D .400 for the Creedmoors. It's the one I was told to use by the guy who created the round and I have used it since the round came out. On the Hornady site it says the .375 so you could probably use that also as it's just a reference point.

Lock‑N‑Load® Headspace Comparator & Anvil Base Kit - Hornady Manufacturing, Inc

Lock‑N‑Load® Headspace Comparator & Anvil Base Kit Lock-N-Load® Headspace Comparator The Lock-N-Load® Headspace Comparator extends brass life, improves accuracy, and enhances safety. The gauge measures...

www.hornady.com

I did. There is the link.