Mag large pistol primers

[Bullett Sass 19707]

I have been using for about 1000 rd small pistol mag primers.   I notice no difference in the rounds over reg small pistol primers.  I got a good deal on large mag pistol primers.  Will I have the same experience?  So, does anyone have experience with this combo? These are CCI mag I now use CCI large pistol in 45 colt and 45 acp.  Thanks Bullett  

[Michigan Slim]

I've seen no difference, but I don't load to the ragged edge. That's where the danger lies.

[Skullbone Willie]

I’ve seen no difference in standard or magnum primers, large or small. I’m mostly using small rifle primers in my 38’s because that was all I could get when I started this adventure this time last year. 

[Eyesa Horg]

I've also seen no difference.

[The Original Lumpy Gritz]

No difference. 

In fact, they may be a blessing in cold weather. 

[Tuolumne Lawman 6127]

IF you load near the maximum pressures, and are using magnum pistol, instead of regular as listed, drop powder charge 10%.  On large volume rifle calibers, drop .4 to .5 grain.  For SASS  velocity loads, I use them interchangeably.

[Tulsey, SASS#11236]

One poster on this thread mentioned using small rifle primers in 38 pistol cartridges.  Small rifle and pistol are about the same size with different hardness and flash potential. Large pistol and Large rifle are not the same size

[McCandless]

3 hours ago, Bullett Sass 19707 said:

I have been using for about 1000 rd small pistol mag primers.   I notice no difference in the rounds over reg small pistol primers.  I got a good deal on large mag pistol primers.  Will I have the same experience?  So, does anyone have experience with this combo? These are CCI mag I now use CCI large pistol in 45 colt and 45 acp.  Thanks Bullett  

 

All I use for CAS loads are Magnum Pistol Primers.  Both small and large.   Better ignition for smokeless rattling around those voluminous cases meant for Black Powder.  I haven't found a discernible difference in cowboy loads.  But, might help when you up your load for those "Long Range Lever Action Pistol Caliber" rounds.

 

[Cliff Hanger #3720LR]

2 hours ago, Tulsey, SASS#11236 said:

One poster on this thread mentioned using small rifle primers in 38 pistol cartridges.  Small rifle and pistol are about the same size with different hardness and flash potential. Large pistol and Large rifle are not the same size

Having reloaded commercially for more than 18 years for cas shooters, this perceived difference in small magnum pistol primers and small rifle primers (non magnum) needs to be addressed. Read the manufacturer primer specs. These two primers are exactly the same from each manufacturer. Only the box labels are different. Small Magnum pistol primers and small Rifle primers use the same cup so there is no difference in cup hardness. The harder cup is for the higher pressures produced at magnum velocities. 38 special maximum pressures is listed at 17,500 psi. The magnum (that would be 357) maximum pressure is listed at 35,000 psi.

[The Original Lumpy Gritz]

9 hours ago, Tulsey, SASS#11236 said:

One poster on this thread mentioned using small rifle primers in 38 pistol cartridges.  Small rifle and pistol are about the same size with different hardness and flash potential. Large pistol and Large rifle are not the same size

SP and SR are the exactly the same size.

LR is taller than LP.

[Knob Creek McGee]

Whenever I change my recipe I run 20-30 through the chronograph. I did an experiment to see if

there was any change going from Federal LPP to Federal Magnum LPP. I was using 6.2gr Winchester 231

in 45LC. Keeping everything else constant I got about 50fps increase in speed. So going from

550fps to 600fps was a difference some people might not notice without a chronograph.

[Rough 'N Ready Rob]

Winchester large pistol primers say on the box, for standard or magnum pistol load. They work for both.

[John Barleycorn, SASS #76982]

I like to use my magnum primers when we shoot BP or subs. 

[Tom Bullweed]

No difference for me with smokeless loads.

I prefer mag primers for bp/sub loads.  The combustion seems more complete and the blowby seems to be reduced.

[Griff]

On 10/23/2022 at 6:37 PM, Bullett Sass 19707 said:

I have been using for about 1000 rd small pistol mag primers.   I notice no difference in the rounds over reg small pistol primers.  I got a good deal on large mag pistol primers.  Will I have the same experience?  So, does anyone have experience with this combo? These are CCI mag I now use CCI large pistol in 45 colt and 45 acp.  Thanks Bullett  

Shouldn't you ask the manufacturer vs a bunch of old guys who can't remember their starting line!    Winchester marks theirs "for Standard or Magnum :oads".   I don't know about other brands, so won't hazard a guess.

[Doc Moses]

I have heard people say that in really cold weather a magnum primer works better. I live in warm East Texas so I cannot say.

[Ozark Shark]

11 hours ago, John Barleycorn, SASS #76982 said:

I like to use my magnum primers when we shoot BP or subs. 

When shooting 777, my guns run cleaner using magnum primers.

[Mustang Gregg]

At lower velocity (re pressures), it won't matter.

I have always used the Win LPM primers and now with the shortages, I use the same in standard.  NO DIFF IN SASS USE.

 

MG

[Gunner Gatlin, SASS 10274L]

Have used large standard and magnum primers in 45 Colt and 44 WCF loaded with real black powder - no difference, no issues. 

 

GG ~ 

[Gateway Kid SASS# 70038 Life]

On 10/23/2022 at 5:37 PM, Bullett Sass 19707 said:

I have been using for about 1000 rd small pistol mag primers.   I notice no difference in the rounds over reg small pistol primers.  I got a good deal on large mag pistol primers.  Will I have the same experience?  So, does anyone have experience with this combo? These are CCI mag I now use CCI large pistol in 45 colt and 45 acp.  Thanks Bullett  

Thinking you should be fine. 
Regards 

    

Gateway Kid