Sinclair seating depth gauge

foxrunner

foxrunner

Active member
I just received my seating depth gauge, followed the enclosed instructions and watched Sinclairs youtube video. I came up with an overall length of 2.367
1.589 when measuring the gauge plus the .778 bullet length = 2.367
The gun is a Savage Model 10 Precision Carbine
From bullet diagrams I looked up on the .223 specs. it says oal should be 2.2598. Is that just a safe measurement? Is the measurement I got of 2.367 to long?
 
Originally Posted By: foxrunner
I just received my seating depth gauge, followed the enclosed instructions and watched Sinclairs youtube video. I came up with an overall length of 2.367
1.589 when measuring the gauge plus the .778 bullet length = 2.367
The gun is a Savage Model 10 Precision Carbine
From bullet diagrams I looked up on the .223 specs. it says oal should be 2.2598. Is that just a safe measurement? Is the measurement I got of 2.367 to long?



How did you come up with a number like 2.2598"

You will NEVER find a throat that measures the same as a SAAMI oal.

You will probably get mad at me for saying this ( but you have to stand on line
lol.gif
)...

... from your question, it appears that you are new at loading... the gauge is giving you information that you can't use. "TMI"

If you are using a magazine, set the bullets to 2.260" or a bit less - if it is a single shot, load them out to touch.
 
Originally Posted By: CatShooterOriginally Posted By: foxrunner
I just received my seating depth gauge, followed the enclosed instructions and watched Sinclairs youtube video. I came up with an overall length of 2.367
1.589 when measuring the gauge plus the .778 bullet length = 2.367
The gun is a Savage Model 10 Precision Carbine
From bullet diagrams I looked up on the .223 specs. it says oal should be 2.2598. Is that just a safe measurement? Is the measurement I got of 2.367 to long?



How did you come up with a number like 2.2598"

You will NEVER find a throat that measures the same as a SAAMI oal.

You will probably get mad at me for saying this ( but you have to stand on line
lol.gif
)...

... from your question, it appears that you are new at loading... the gauge is giving you information that you can't use. "TMI"

If you are using a magazine, set the bullets to 2.260" or a bit less - if it is a single shot, load them out to touch.




I don't get mad!!!
So what your telling me is the Sinclair gauge is useless??
Yes, I am brand new at re-loading. I just want to know how to figure out what my overall length should be. By measuring it with the gauge it gave me a max length touching the lands, correct?
C'mon Cat help me out, your not gonna make me mad!!!lol
 
The Sinclair tool is giving you good info although realize that there can be slight variations in bullet lengths from bullets in the same box.
If you are shooting a bolt gun then try the 2.367 length first and as you try loads you may want to try .010- then .015 shorter just to see if groups get better or worse.

If you are shooting an AR as catshooter says just seat to magazine length. 2.260 max.
 
It will leave marks on your bullets where they are shoved into the lands if it is somewhat tight. If it pulls a bullet out of your case when you eject one then its too tight.

When you first measured with the gauge if you just dropped the bullet in and did not tap it into the lands then you should be OK.
 
Yes, I just dropped the bullet in, same with the brass, just gently pushed it in. Did the process 3 times and got the same measurement.
 
Your good to go... but I will make one more point. Not sure what bullet it is but rule of thumb is to have about the diameter of the bullet (.224) minimum seated into the case neck.
So in this case your bullet measures .778 minus .224 leaves .554 of your bullet exposed. This is NOT a hard and fast rule just a guide to ensure you have enough bullet in the neck to hold it secure. I break this rule of thumb all the time with bolt actions.
grin.gif
 


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