Bullet Seating Dept

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Supermanofsteel

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Hello I am reloading for a .270 (Savage Rifle) I'm using 130gr Hornady SST bullets.

The data in my manual says C.O.L. = 3.210. When I seat to this depth the cannelure slips just below the edge of the bullet like it should.

The issue I'm running into is I'm trying to seat the bullet to approximately .20 before the groves in the barrel. I've made a case with a neck that allows the bullet to slide. I've put it into the rifle and closed the bolt etc and the length comes out to 3.400. With the -.020 my calculation for C.O.L. would be 3.380.

Now the ogilvie on the SST is pretty narrow but is this right to be .170 longer than the book suggest?

As you can see from the picture the cannelure is sticking out pretty far. I don't crimp so it's not an issue. I'm just worried I'm doing something wrong.

 
looks about right to me, unless it won't fit in your mag.

The col listed in the books is to ensure that the round will fit in 95% of the magazines and not necessarily to match your chamber specs. Also you have to remember that your throat is going to erode roughly 1 thou for every 100 rounds you shoot.......
 
Looks good to me as well. There are only 4 or 5 cartridges that I load for that end up being seated to the cannelure. (7.62x39, .357 mag, .44 mag. .375 H&H, .45-70 Gov't). The only reason that they're seated to the cannelure is for function and/or magazine length.
 
General opinion is to have at least 1 caliber's worth of bullet seated in the neck.
Example - .308 dia bullet, have at least .308 of the bullet seated securely in the neck.
If you're using BT bullets, make sure that you don't include the boattail part of the bullet in the measurement.
Looking at the photo that you posted, I'd say you have nothing to worry about
 
sniper58 said:
General opinion is to have at least 1 caliber's worth of bullet seated in the neck.
Example - .308 dia bullet, have at least .308 of the bullet seated securely in the neck.
Click to expand...

tell that to some of my target rifles........I have about a 8th of a inch of bullet in the neck of the case..........
 
sniper58 said:
General opinion is to have at least 1 caliber's worth of bullet seated in the neck.
Example - .308 dia bullet, have at least .308 of the bullet seated securely in the neck.
If you're using BT bullets, make sure that you don't include the boattail part of the bullet in the measurement.
Looking at the photo that you posted, I'd say you have nothing to worry about
Click to expand...

Sniper 58 has it covered
 
Yup, no problem there...looks identical to my 6.5 Creedmoor depth. What the bullet is actually contacting with your dummy round are the lands and not the grooves. You do need to be careful that the bullet in the dummy round isn't too tight in the neck or it can jam into the lands and pull out a bit as you eject, giving you a longer OAL than you actually have. If the bolt is tighter to close on a loaded round than normal, that would be your first indication that something is wrong.
 
One of those Stony Point/Hornady OAL guages is very helpful particularly if you drill and tap a casing fired from your rifle.

Looks exactly like the bullet depth in all my 303 reloads ;).
 
yodave said:
looks about right to me, unless it won't fit in your mag.

The col listed in the books is to ensure that the round will fit in 95% of the magazines and not necessarily to match your chamber specs. Also you have to remember that your throat is going to erode roughly 1 thou for every 100 rounds you shoot.......
Click to expand...


You are speaking generally about throat erosion and not specifically about the way the OP has seated his bullet right?
 
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