Importance of case length

[JMayo]

This begs a reply but I will refrain,lol.

Lol yeah kinda left off "with my scope"

 

[jaytee]

Brownell's/Sinclair's have a chamber length tool that will give you and exact measurement as to how long the neck length is in your rifle. You'll probably need to sacrifice one case to use with this gizmo, but it will give an exact measurement on the neck length and when you need to trim cases.

Doesn't the Hornandy Cartridge Overall Length gauge/tool do the same thing.

 

[Hoot]

Doesn't the Hornandy Cartridge Overall Length gauge/tool do the same thing.

No, it's for measuring where the bullet touches the lands. It cant measure the point at which the chamber neck ends in its normal state. There's a way to utilize it however, to determine the end of the chamber neck. You take your OAL Case and chop off most of the neck. You then coax a short length of neck ring over a bullet appropriate for the caliber you're testing and using the OAL gauge, slide it forward until the ring stops at the end of the chamber neck. Lock the gauge down, and pull it and the ring bearing bullet out. You can then measure the distance from the case face to the ring front. Sounds more difficult using words to explain. If I can find one of mine, I'll post a picture. Its really not that hard to implement. If like me, you have the tap for making your own OAL cases, you're only out the cost of an unwanted case and some fiddling time..

Hoot

 

[jackieschmidt]

I make up one of these for each reamer I use. This allows me to take a quick look at the case to See how much clearance I have at the end of the chamber. the end of the chamber.

 

[JMayo]

I make up one of these for each reamer I use. This allows me to take a quick look at the case to See how much clearance I have at the end of the chamber.View attachment 1325675 the end of the chamber.

Intrigueded .. how does it work?

 

[jackieschmidt]

 

[JMayo]

View attachment 1325726View attachment 1325726View attachment 1325728

Oh ok i get it. It's a copy of the chamber end.
This is a scope pic of a case in my rifle.

 

[Hoot]

That looks like a near perfect fit to me.

Hoot

 

[PhilC]

I think he meant "Chamber a piece of empty brass and borescope from the muzzle" as opposed to drilling out the primer pocket on the brass and scoping from the chamber end. The borescope needs to be long enough to reach the mouth of the brass though.

If you have a bore scope drill out the primer pocket so you can put the bore scope through it.

Jeff's comment applies to those using shorter boresopes like a 17" or 22" Hawkeye and can't reach the chamber from the muzzle.

For those with the longer Teslong borescopes there's no need to drill the primer pocket as they easily reach the chamber from the muzzle.

 

[Twicepop]

Doesn't the Hornandy Cartridge Overall Length gauge/tool do the same thing.

The piece from Sinclair is a short piece of leaded steel that is two diameter. The smaller end is designed to fit into the shortened neck of brass your using. The larger end is approximately the diameter of the outside of that same piece of brass with a small shoulder to keep it from being pushed inside the case. It measure the length of your chamber only up to the point where the leade starts. It's only for use to show you how long your brass can be before it must be trimmed.