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Old 03-18-2019, 04:31 PM   #1
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Seating depth with canaluer boolits

Well it's probably obvious I am still a rookie by this question. But I am still in the "Safety over everything" mode. I've been trying to come up with a load for my 357 snubbie and am having problems with seating depth with projectiles with a canaluer. When I set my seating depth at the prescribed depth from the loading manual or powder company, it doesn't ever seem to be where the canaluer is. The last time I loaded, I had to set the bullet an additional .015" in to get to the canaluer. In my mind, (scary place to be sometimes)I was safe since I was loading at the very low end of the powder charge. But boy what a whack I got when I fired them. No kaboom or evidence of high pressure but just felt way to hot! Needless to say I won't do that again until I find out what the pros here think. This can't be an issue as I haven't seen any discussions anywhere on the interweb about this issue. By the way, I'm probably spelling canaluer wrong but it's fun to say. Is there anyone here that can school me on this?
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Old 03-18-2019, 05:53 PM   #2
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If you just load your brass at low-mid powder levels(taken from reloading manual for your bullet weight), and seat your bullets to where the case mouth is roll crimped into the cannalure, you will be more than safe.

Just know, if you are using 357Mag powder loadings in your 357Mag brass, and shooting these rounds in a lightweight snubby handgun, you can well expect a healthy recoil impulse. Some of us have discussed this with you before, I believe.
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Old 03-20-2019, 12:30 PM   #3
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I have been reloading for revolvers since '69 and largely have disregarded manual's OAL recommendations. I seat to the crimp groove/cannalure and crimp. I started with the 38 Special and figgered the bullet designer knew what he was doing when he located the groove/cannalure and not just haphazardly placed a groove somewhere on the bullet.

The OAL dimensions in your manual are reports of what the lab tech. found when he used his components in his guns/equipment. For revolvers, as long as the cartridge fits in the cylinder, and a decent crimp is used (99.9% roll crimps), seating to the crimp groove/cannalure is safe and efficient. (I reload for 7 revolvers in 5 different calibers and have been able to produce very consistent, very accurate handloads this way).
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Old 03-20-2019, 04:19 PM   #4
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Thanks GT40doc and Mikld. I suspected these might be the answers I got. I just met a man from church that is 83 years young and still loads for revolvers and his comment was pretty much the same. So my fears have been taken care of. And yes I am aware of the different amounts of recoil with different guns, that's why I'm trying to come up with a good middle of the road load. Thanks again & God Bless.
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Old 03-22-2019, 04:10 PM   #5
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If using a revolver or tube-fed magazine, USE THE CANNELURE.
The START load is given for safety. Once upon a time, manuals did NOT list COL as there loads were designed to cover all bullets of that weight, caliber, and construction.
USE the START load.
I NEVER pay attention to the manual's COL.

COL Note:

Per Ramshot (and all other reloading suppliers):
“SPECIAL NOTE ON CARTRIDGE OVERALL LENGTH “COL”
It is important to note that the SAAMI “COL” values are for the firearms and ammunition manufacturers industry and must
be seen as a guideline only.
The individual reloader is free to adjust this dimension to suit their particular firearm-component-weapon combination.
This parameter is determined by various dimensions such as
1) magazine length (space),
2) freebore-lead dimensions of
the barrel,
3) ogive or profile of the projectile and
4) position of cannelure or crimp groove.
• Always begin loading at the minimum "Start Load".

Your COL (OAL) is determined by your barrel and your gun and your magazine/cylinder. What worked in a pressure barrel or in my gun may have little to do with what will work in your gun. Load a couple of dummy rounds (no powder and no primer) to the max. COL (OAL) and see if it fits your magazine, feeds in your gun, and chambers in your barrel.
Seat the bullet slightly deeper until you achieve all three of these goals. This is the COL (OAL) for you in your gun with that make of bullet.
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