223 WYLDE CHAMBER LENGTH

[Pawnee Bill]

Just measured my new IBI 223 Rem barrel with a Wylde chamber using Sinclair's chamber measuring tool and got a reading of 1.791. Does that sound right?

 

[GLShooter]

That's a tad long but not out of line with other chambers I've measured. The good thing is you can let your cases grow before having to tri plus doing that you do gain a very slight case capacity.

 

[Pawnee Bill]

That's a tad long but not out of line with other chambers I've measured. The good thing is you can let your cases grow before having to tri plus doing that you do gain a very slight case capacity.

Yeah, I won't be trimming for a while.

 

[GLShooter]

Yeah, I won't be trimming for a while.

Those Sinclair tools can cause a lot of head scratching.. LOL Unless it's your own personal reamer we are at the vagaries of the makers..

I like personal reamers on mine BTW.

Greg

 

[Pawnee Bill]

BTW, the Sinclair instructions states to maintain no closer than .024 to the chambers end. Any reason for that particular clearance number?

 

[6bra1k]

BTW, the Sinclair instructions states to maintain no closer than .024 to the chambers end. Any reason for that particular clearance number?

lawyers...and case growth does vary by chambering
ar's tend to strech on extraction..but i trim everytime

 

[Edd]

Just measured my new IBI 223 Rem barrel with a Wylde chamber using Sinclair's chamber measuring tool and got a reading of 1.791. Does that sound right?

The SAAMI spec for a 223 is 1.772"+.015".

 

[6bra1k]

The SAAMI spec for a 223 is 1.772"+.015".

not disagreeing, just the words
chamber case length is 1.772, drawing length tolerance is +.015

saami case length is 1.760 -0.030
worst case as built there is .012 clearance from case neck to chamber neck end and possible to be up to .042.

trim your brass either to spec or measure your chamber and trim for some clearance

 

[jelenko]

I just got the Sinclair chamber gauge.
In Wylde chambers from two different suppliers, the lengths measured 1.792 and 1.795.

Using bolt tail bullets, is there any issue with not chamferring after resizing? [Accuracy objective in the 1/2 - 3/4 MOA range].

 

[GLShooter]

Chamfer will decrease the chance of bullet jacket scrape and allow for more consistent seating.

 

[fkimble@charter.net]

You only need to chamfer after trimming or when new. The chamfer stays until you trim it off!

"you do gain a very slight case capacity"
More like you gain a little more neck length and more bullet length in the neck.

Frank

 

[CaptainMal]

Do not think there is a throating length specified. I have a Wylde chambered AR with a short throat. Sure tricked me as I expected to be able to pass magazine length OAL for target ammo shot single shot.

Got a rude awakening on that issue.

 

[chuckshooter]

You only need to chamfer after trimming or when new. The chamfer stays until you trim it off!

Frank

unless you clean your brass in a tumbler with stainless steel pins like i do.

 

[fkimble@charter.net]

Chuckshooter, you are absolutely correct! I don't use pins but I do know about it! Thanks for reminding us and keeping me straight!

Frank