First off , my Hornady book calls for large rifle primers. My Lyman book calls for large rifle,magnum primers.

I use a haornady hand primer and seat primers as far in as this tool will go . There is no adjustment, it goes in all the way.

My revolver is the 460xvr in 5”, factory ammo shoots fine , all my reloads are loaded only 1 grain above minimum, and when I get a lite strike I back up the cylinder and fire again and the cartridge goes off.

I’ve tried cci, Winchester, and just today federal primers , I’ve tried large rifle and large rifle magnum primers , and as of now am still getting lite strikes both in single and double action .
I’ve contacted S&W after holding for 30 min that basically will do nothing as long as it works with factory ammo.
The S&W rep I talked to said sure go ahead and try magnum pistol primers ! But I do not think that is a good odea because of the high pressure .

My local smith recommends getting a longer firing pin , I’m watching ting on a new release from apex tactical that is suppose to be a beefier, slightly longer firing pin designed for this heavier gun/cartridge the X frame.

I’m quite disappointed with this fire arm, I have 2 mod 29 and a mod 629, and reload all my 44 mags , theses 3 pistols have no issue with setting off the large rifle magnum primers !

See reply to your post here
#16
460 load data

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Still Running Against the Wind

Man, that'll test you for flinching. Bracing for a major BABOOM and you get a whimpy click :-)

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Dave

If factory ammunition works fine in your gun it should have no issues with properly constructed hand loads.

If you loads are firing on the second hammer drop it is almost certain they were not seated correctly. The first strike the primer is driven to the bottom of the pocket, the second strike now allows the anvil interaction igniting the primer.

While many think a longer firing pin fixes this it increase the chance of a pierced primer - at 460 pressures a few of these will result in bushing erosion and /or damaged firing pin.

On the subject of Magnum verse Standard primer, both primers are the same dimensions and typically use the same cup - the difference is the brisance the primer produces. This has nothing to due with primer ignition. It does however change the powder ignition characteristics and should be matched with the powder you are using.

Powders such are H110 would be typical example of a powder were a Magnum primer is typically recommended. 4227 is an example of a powder were a standard primer will produce better results.

Winchester WLR primers are a common choose in 460 because they have a brisance typically greater than many Magnum primers and double base powders respond better to higher ignition forces and higher start pressures (simplified explanation).

good luck and be safe
Ruggy

As stated above 99.9% of failure to fire are caused by not seating the primer properly.

A primer should be seated with a slight pre-load on the anvil and a very slight primer crush.



Get a new adjustable priming tool with good feel as the primer seats and bottoms out in the primer pocket.

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