Had my second 'pffft' round today.

My guess is smaller powder charge.

How are you charging your cases with powder?

Possibly.

Buy a carbide sizing die, no lube needed with 45acp

PO2Hammer said:

Never had a misfire before.

The only thing new is lubing my cases with One Shot

Click to expand...

So go back to not using One Shot and see if you experience further misfires. If you only get misfires with One Shot, then you can suspect One Shot.

PO2Hammer said:

4 grains WST ... Happened a couple weeks ago with W231, same symptoms.

The only thing new is lubing my cases with One Shot. I spread them randomly on a cloth and spray them lightly. Could the One Shot be contaminating my powder?

Click to expand...

I guess we could do myth busting of One Shot "contamination" effects on powder.

How much time passed before you shot your reloads?

Bwana John said:

Buy a carbide sizing die, no lube needed with 45acp

Click to expand...

OP is likely already using a carbide sizer.

With wet tumbling and overly expanded 9mm Major brass, I think some reloaders HAVE to lube their brass to make resizing effort easier. With my ABLP/Pro 4000 using Lee carbide dies, resizing even wet tumbled squeaky clean brass is no issue. Takes a little bit more of "Ooomph" on the ram lever than resizing brass dry tumbled with NuFinish polish that leaves residual polymer on brass surface for easier resizing.

We did myth bust effects of wet residual One Shot on neck tension here - https://www.thehighroad.org/index.p...affect-on-neck-tension-bullet-setback.834035/

I use One Shot with all my pistol brass. I spray it and then walk away for about ten minutes to let it dry before I begin to load. Never had a problem. Seems people like it or don't, not much middle ground.

chris

I use one shot. Spray it in a plastic bag, throw in some cases and shake/roll around. I don't lube every case, I just pick up a lubed one every 8-10th case. Makes the non lubed ones go easier. I've never had a problem with the lube causing a pfft.

switch primer type. i can't imagine oneshot contaminating your primer let alone all the powder in a case. you spray it on the outside, right? [being facetious]

luck,

murf

PO2Hammer said:

Could the One Shot be contaminating my powder?

Click to expand...

If it is, you're the first I've ever heard of it and lots of people use it.

LiveLife said:

I guess we could do myth busting of One Shot "contamination" effects on powder.

How much time passed before you shot your reloads?

Click to expand...

OK, looks like One Shot contamination of powder is being added to myth busting.

Stay tuned.

One Shot is a wax based lube.

I put brass in a plastic bucket, spray it with OS, swirl it around, dump it in the collator and start loading. I've NEVER had a problem with almost 100K rounds loaded.

Anyone that says you don't need lube with carbide dies is nuts. It makes the process MUCH easier.

PO2, how are you cleaning the brass? Do you have unburnt powder granules in the barrel/action when this happens?

One shot will not keep your primers or powder from going off. Something else is going on.
I've been hosing my cases down with it also, since it came out, and have never had that issue. I spray them directly and I'm not even careful about it. I knock all cases down on their side and let them have it. Been doing it since I could buy the stuff. I just give it a good shaking before I use it.

I think you have something else going on.

4.0 gr of WST is pretty light, In use 4.1 with the 185gr LSWC. Remember WST is reverse temp sensitive, so as the temp heats up it slows down. I'm thinking you had a low charge. I've been using OS for lube for over a decade with no issues.

PO2Hammer said:

LiveLife said:

My guess is smaller powder charge. How are you charging your cases with powder?

Click to expand...

I think I'll go back to leaving the rotor in the fill position between dumps. (like the rest of the free world)

The extra fill time and vibration of the press should insure a 100% full rotor.

Click to expand...

WST is fairly small granule flattened ball powder slightly larger in size compared to coated (also flattened ball) W231/HP-38 and has metered well for me.

Try charging the case both ways and see if you can weigh the difference.

Like I said, never in 20 years of handloading have I ever had a misfire, so it has to be the spray.
I think I'll just stand them up so the case mouth is protected.

Click to expand...

If you have been doing the exact same thing for 20 years and just changed one variable, I too would be highly suspect of that one, if problems surface immediately after the single change.

PO2Hammer said:

The only thing new is lubing my cases with One Shot.

Click to expand...

Hornady makes two different “One Shot”s. One is a cleaner and dry lube, one is a case lube. I just had to ask since I have both on the shelf, and well, jeez, I’ve grabbed one and thought it was the other.
@LiveLife , perhaps if you’re doing myth busting, you’d be so incline to add both of these to the test just to see if that cleaner dry/lube can be deleterious?
I’ve been shooting the One Shot case lube for close to 15 years and haven’t noticed any ill effects. Any chance your primers might be contaminated in some way? I use a progressive and the primers aren’t touched by hands and/or oils.
Good luck finding this one!

I agree... light powder charge.

Maybe your scale has lost it's calibration. Check for any electrical devices producing a lot of current or a magnetic field.

Texas10mm said:

One Shot is a wax based lube.

I put brass in a plastic bucket, spray it with OS, swirl it around, dump it in the collator and start loading. I've NEVER had a problem with almost 100K rounds loaded.

Anyone that says you don't need lube with carbide dies is nuts. It makes the process MUCH easier.

PO2, how are you cleaning the brass? Do you have unburnt powder granules in the barrel/action when this happens?

Click to expand...

I believed that lube wasn't needed for carbide dies until I had to send a sizing die back to Dillon. Now, I put my brass in a zip lock and spray with One Shot. I WANT some on the inside of the cases, to lube the expander. Prior to that I was getting brass build up on them and had to polish them every so often. In my opinion, new brass should always have lube. Dillon says as much. In my case, I was overcleaning brass, so I backed off of that and started using Wash & Wax. I should probably try a test batch with no lube, just Wash & Wax.

Adding my .02, I have had no problems with One Shot and powder contamination. I have no where near the round count many of these guys do, though.

I used One Shot for a good 10 years with no problems. Then I switched to Iso Heat and Lanolin to save money. I must have a good 10 years with this mix without problems either. I really hose the brass down. Enough that after sizing it still feels greasy. Then I load it. Followed by wiping it down or running it through corn cob for 15 min or so to remove the greased feeling.
When I run out of this batch I am going to try some wire pulling lube instead of the lanolin. I get the dregs in the bottom of bottles we use at work. I like the free part when making some concotion or another.

Why are you not using the Dillon powder measure?

I love WST for 45acp. But 4.0 grains is pretty light. in 230gr 4.0gr is the starting charge for LRN. After testing, I settled on 4.4gr of WST using 230gr ACME coated bullets. Out of curiosity, I went over to the Hogdon sight and did a quick input using 185gr. Below is what came up:


CH

Are you crimping? Seems like maybe the bullet is pulling and adding to case volume which significantly lowers pressure and burn characteristics. Just spitballing... I despise one shot but honestly can’t see it being the culprit unless your loading Immediately after spraying and letting it wet your powder.