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Any variance in .45 APC loads between small and large primers?

1073 Views 13 Replies 11 Participants Last post by  MoKen, 
Lone Eagle
I was going through my brass, and noticed I am running about even between small and large primer casings. I Gurgled, however, not much info out there.

So, is there anything special I need to know loading SPP casings with LPP data, or just rock on with a different primer?
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Peacemakr40
I load both identically and haven't noticed a single difference.
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texastaurusguy
I've never even seen a differentiation between them in any reloading manual, so that would make me think any difference must be very fractional, like 20 fps or less.
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Fishinkeylargo
A while back I did some chrony work with the two and only noticed a small difference if I remember correctly. Not enough to make a difference.
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Czechbikr
Olfarhors spoke about it today and says he didn't notice a difference. I've not loaded any yet, but retain a few hundred for shortages...I still shudder at the months we spent searching for primers and powder.
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mingaa
...AND you could use small pistol magnum primers and gain 20 FPS as well. ;)
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Czechbikr
mingaa said:
...AND you could use small pistol magnum primers and gain 20 FPS as well. ;)
Click to expand...

I got so desperate during last drought that I bought thousands of Wolf primers. :rolleyes:
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Fishinkeylargo
For me the two different primer sizes are not an issue. I have buckets full of each. I sort them as I deprime them with the universal depriming die. When I load them they are kept separate and labeled. As stated earlier by others, when primers were hard to find at reasonable prices I was glad I had options. I had way more small pistol primers than I did large, so using the small pistol primers in .45 ACP gave me a buffer of large pistol primers for .45 Colt.
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Lomax
If these cases were all I had, I'd load it to spec and shoot 'em. Large primer or small, they'll both yield similar results with published load data available.

Everything I load is built up from range brass and my big thing while reloading is consistency of components within each batch I reload. So each time I reload I separate my brass by brand and toss anything that looks questionable. I can load mixed brass and get it to function correctly, but the end result will be mixed also. I enjoy shooting for distance with my revolvers, and when I reach out to 200yds., inconsistent(mixed) reloads always let me down accuracy wise.

This pic shows one Blazer SP primer pocket, a LP CCI and two nickle plated LP Federals. Each one has a different sized flash hole. Even when loaded the same, I doubt these four rounds could produce a bug hole at 10 yds.

Brass Metal


I was told once that it helps the powder burn cleaner, but I toss all brass where a previous reloader has enlarged flash holes.
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olfarhors
Lone Eagle said:
I was going through my brass, and noticed I am running about even between small and large primer casings. I Gurgled, however, not much info out there.

So, is there anything special I need to know loading SPP casings with LPP data, or just rock on with a different primer?
Click to expand...
For me and my 45's, some 12-14 of them if I remember right!
there is NO difference, at least no more difference than the variation in all LPP brass , Sometime back when this was a discussion I loaded quite a few hundred 45 SPP and LPP cases exactly the same, powder, weight, projectile, OAL and shot them .
there is no way that you or I could tell one bit of difference inside 25 yards. that's as far as I shot them.
so I load the same regardless of primer.
Now I do not load powder puff loads, not top level power but certainly not powder puffs either, this was also using unique, HS-6 and Accurate #5 powder, but i can't see where different powder would make a difference?
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JeeperCreeper
Lomax said:
If these cases were all I had, I'd load it to spec and shoot 'em. Large primer or small, they'll both yield similar results with published load data available.

Everything I load is built up from range brass and my big thing while reloading is consistency of components within each batch I reload. So each time I reload I separate my brass by brand and toss anything that looks questionable. I can load mixed brass and get it to function correctly, but the end result will be mixed also. I enjoy shooting for distance with my revolvers, and when I reach out to 200yds., inconsistent(mixed) reloads always let me down accuracy wise.

This pic shows one Blazer SP primer pocket, a LP CCI and two nickle plated LP Federals. Each one has a different sized flash hole. Even when loaded the same, I doubt these four rounds could produce a bug hole at 10 yds.

View attachment 417545

I was told once that it helps the powder burn cleaner, but I toss all brass where a previous reloader has enlarged flash holes.
Click to expand...
Enlarging the flash holes sounds like it could be dangerous, no?
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olfarhors
heck I guess its possible?
but honestly some time when you are at a range or just look at your own brass if you use multiple brands and you will see all different shapes, sizes of holes, some are really pretty ragged looking, seems like they may be punched into the brass with a triangle shaped tool or something.
I remember years and years a go when I did a bit of bench shooting the thing for superior accuracy was to standardize and smooth out flash holes, along with about 25 other irritating things.
To ANAL for me and I gave that up.
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william
I often find flash holes that the decapping pin will not fit through. Therefore, I uniform all my flash holes.

olfarhors, I prefer the term precise. :D
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MoKen
I've ran both round over my chrony and found very little difference.
And as far as flash holes I would just want them uniform.
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