Large Pistol Primers in 30-30 instead of Large Rifle Primers?

[mdi]

mdi's "Substitution" is problematic. The Large Rifle Primer Cup stands .008 taller than does a Large Pistol Primer. This means; placing a Large Rifle Primer into a .45acp or other pistol case will result in a primer standing "Proud" from the base of the case itself. Potential for failure to chamber, Irish primer on "Slide forward operation/or not going into battery, or a slam fire. By "Seating Hard" to achieve a Large Rifle Primer in a Large Pistol Primer pocket; crushing of the Primer is probable, which could be reason for the 5% failure to fire mentioned.

Seating a Large Pistol into a Large Rifle Primer pocket goes the other way. The Firing pin MUST travel further to impact the primer and crush the mix between the Primer Anvil and the Primer Cup; so some rifles may bot have the Firing Pin travel length - or sufficient force when the Firing Pin impacts a Large Pistol Primer in a Large Rifle primer pocket.

Hmm. Yes the large rifle primer is .008" taller than a large pistol primer, as I mentioned in post #2. In my post about my experiment you will see I made mention to a hard cleaning (scraping of the pocket bottom) possibly removing some metal, deepening the pocket, and "seating hard" alluded to making sure the cup was below flush. I made sure none were "standing proud"

I don't mind correction/criticism about my posts as I surely don't know everything, but ignoring what I actually said and quoting my posts and correcting something I didn't say is uncalled for. If you want to quote me, please make sure the quote is about something actually posted. Perhaps I should "dumb down" my posts to make sure there are no reading, interpretation problems?

I researched all primers in the '70s (waaaay pre web and used texts I found in the library, no "internet wisdom". One of my first "I wanna know" experiments, circa 1970 or so, was taking apart a primer to see exactly how they work and I learned that a primer must be seated all the way to the bottom of the pocket with the anvil solidly against the bottom) and started reloading large pistol primers in about mid '90s and large rifle primers in early 2000, so I am somewhat familiar with many primers and types. My post was about an experiment I conducted. Not a recommendation...

[mdi]

And you can use a small rifle or pistol primer INSIDE of a Gutted LP primer(with the firing pin dent ironed out)- it worked when I tried it.
Cats can be skinned in a few ways.


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YES! Another reloader thinking "outside the box". I once ran out of 209 shotshell primers. I poked the spent primer out of the battery cup and seated some large pistol primers. Tried about 20 and all went bang and got me through until some 209s showed up...

This is just something I did, not a recommendation...

[racepres]

YES! Another reloader thinking "outside the box". I once ran out of 209 shotshell primers. I poked the spent primer out of the battery cup and seated some large pistol primers. Tried about 20 and all went bang and got me through until some 209s showed up...

This is just something I did, not a recommendation...

Just did that the other day... worked fine...

[atr]

I have successfully used LP primers in my 30-30 Savage 340....never had a problem. I even tried them in my 35 Whelen, using GI brass and again no problem. Full J-loads in each case.
best
atr

[jeffsmith13]

After reading the book “forty years with the 45-70” I tried a load in my handi rifle with large pistol primers in 45-70 brass and it was good to go.

[nanuk]

Hmm. Yes the large rifle primer is .008" taller than a large pistol primer, as I mentioned in post #2. In my post about my experiment you will see I made mention to a hard cleaning (scraping of the pocket bottom) possibly removing some metal, deepening the pocket, and "seating hard" alluded to making sure the cup was below flush. I made sure none were "standing proud"

Possibly? removing metal? Alluding to?

I don't mind correction/criticism about my posts as I surely don't know everything, but ignoring what I actually said and quoting my posts and correcting something I didn't say is uncalled for. If you want to quote me, please make sure the quote is about something actually posted. Perhaps I should "dumb down" my posts to make sure there are no reading, interpretation problems?

quoting your actual post for you.

An aside for the OP. Being a forum that allows everyone to post their answers/opinions, you are going to get answers from "it's not a good idea" to "I do it all the time problem free". Personally I would not use large pistol primers in any large rifle primer application, but being a "jes wanna know" kinda guy I have experimented with many substitutions. One of my last was using large rife primers in large pistol applications. I used large rifle primers in some 45 ACP handloads. Cleaned primer pockets well (aggressively) and maybe scraped some off the pocket bottom, seated "extra firm" with a ram prime and I got about 95% success in my stock 1911 Will I make this an ongoing part of my loading method? Nope.

nowhere did you mention anything about about primers seating flush/below flush, thus Mustang's warning. Slamfires are real, and can be hazardous. Something we all need to be aware of.
Also, "Extra Firm" seating can indeed cause FTFs. I have proven that to myself.

I researched all primers in the '70s (waaaay pre web and used texts I found in the library, no "internet wisdom". One of my first "I wanna know" experiments, circa 1970 or so, was taking apart a primer to see exactly how they work and I learned that a primer must be seated all the way to the bottom of the pocket with the anvil solidly against the bottom) and started reloading large pistol primers in about mid '90s and large rifle primers in early 2000, so I am somewhat familiar with many primers and types. My post was about an experiment I conducted. Not a recommendation...

Good for you. I have always enjoyed reading about those who "lead the way" during the PreWeb years. We learned a LOT, and still have a lot to learn. Thank you MDI for doing your experiments.

Please, don't get your panties in a knot, just because someone else wants to add caution, so we all can learn and learn SAFELY.

this forum is going to hell and it saddens me, as there is so much information yet to be proffered.
I've had to block folks because my panties got so knotted up, I couldn't sit!!


Right now, up here in Canada, LR primers are almost non-existant, and when available, folks are asking $1.00 each!!!

Crazy times!
I'm always on the lookout for alternatives.

[dondiego]

A lot of guys on here need to get rid of those panties and switch to boxers or loose Fruit of the Loom's!

[Shawlerbrook]

Got some loads from over on Marlinowners using Magnum large Pistol primers with light cast boolit 30 30 loads. Haven’t tried them yet.