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The Powder Room - CAS reloading / Re: Round nosed bullets in a tubular magazine?
« Last post by Mako on April 15, 2024, 05:40:35 PM »Black River,
Sadly, Coffin Maker, RoyceP and the others are right, not because that is the "way it was always done" but because it is not safe. So let's shed some light on this:
I think something that is being overlooked in this “discussion” is the difference between Large Rifle and Large Pistol Primers.
When discussing the .30 WCF cartridge, remember it uses Large Rifle primers that have a cup thickness of .027”. The Large Pistol primers “all” have a cup thickness of .020”. That thickness is 26% thinner than the rifle primers (plus some pistol primers are softer than others, I can attest to that).
These are the facts:
Even with all of my family experience with .30 WCF using in many cases round nose bullets you will never see me use, advocate or even hint that you can use less than a flat nose bullet in a pistol caliber tubular magazine carbine/rifle.
So as Coffin Maker and RoyceP and all of the others counsel, why take a chance with a pistol caliber tubular magazine carbine/rifle? It’s not like there is a dearth of flat nose bullets out there for them. And please don't add to the confusion (that's my job...)
~Mako
Sadly, Coffin Maker, RoyceP and the others are right, not because that is the "way it was always done" but because it is not safe. So let's shed some light on this:
I think something that is being overlooked in this “discussion” is the difference between Large Rifle and Large Pistol Primers.
When discussing the .30 WCF cartridge, remember it uses Large Rifle primers that have a cup thickness of .027”. The Large Pistol primers “all” have a cup thickness of .020”. That thickness is 26% thinner than the rifle primers (plus some pistol primers are softer than others, I can attest to that).
These are the facts:
- We are talking about Round Nose Bullets in .30 WCF. We are not talking about spire points of any kind or plastic “Ballistic Tip” type of bullets.
- A rounded nose bullet in the .30 WCF rests against a relatively thick primer cup, so we would expect less of a problem with that and with other Large Rifle Primer cartridges that are chambered in tubular magazine rifles.
- NONE of us shoot centerfire Rifle cartridges in standard Cowboy matches, we shoot “pistol catridges” in carbines and rifles. This means we have to use Pistol Primers in any cartridge using a Large Primer (Large Rifle primers are too tall, the primer pocket in a rifle case is .007-.008” deeper.) You cannot use Large Rifle Primers in “Pistol Cartridges”) Therefore we have thinner primer cups for a less than flat nose bullet to push against.
- Don’t get this confused with Small Pistol and Small Rifle Primers, because YES, you can use Small Rifle Primers in Pistol Brass. We used Small Rifle Primers in .38 Super, .38 Super Comp and 9x23 loads (back when Men were Men and we had a 175 Major Power Factor). But, we could because the primer pocket depth is the same for Small Rifle and Small Pistol pockets.
- Just so you know, Small Pistol Primers (including magnum) have an even thinner Primer cup, .017”. So we used either standard Small Rifle Primers with .020” thick Primers and some pistols could set off the Magnum Small Rifle Primers (includes the CCI 41 for Mil-Spec ammo) with .025” thick cups. All Small Magnum Rifle Primers have thicker cups.
- The worst case scenario for bullets hitting primers in a tubular magazine is someone dropping a magazine follower on a partially loaded 1860 Henry (Modern Centerfire reproduction) with less than flat nose bullets. There have definitely been some magazine tube explosions.
Even with all of my family experience with .30 WCF using in many cases round nose bullets you will never see me use, advocate or even hint that you can use less than a flat nose bullet in a pistol caliber tubular magazine carbine/rifle.
So as Coffin Maker and RoyceP and all of the others counsel, why take a chance with a pistol caliber tubular magazine carbine/rifle? It’s not like there is a dearth of flat nose bullets out there for them. And please don't add to the confusion (that's my job...)
~Mako