Magnum Pistol Primers Vs Standard

[ks-shooter]

Does this sound crazy to anyone else but me.

I accidently went from Magnum Pistol Primers to regular pistol primers (all Winchester) and my 40 s&w loads changed from making minor to missing by 50 fps!!

I am new to the USPSA scene and the reloading arena. I thought I had found a nice 40 load. 2.9 Clays, 180 Berry's RS, seated at 1.12...worked great-130PF. Then I ran out of the primers that came with my "used loader deal" and purchased Winchester primers. These were brass color instead of silver. Loaded around 100 rounds and since I live in the country, went out the back door and chrono'd the loads. My XD Tactical would not cycle the rounds even with the 15 pound spring that I installed, Failure to eject, Failure to feed...I had no idea that a primer could make this difference. Anyone else ever experience this much change or should I question my press or powder scale?

[R/T Performance]

Does this sound crazy to anyone else but me.

I accidently went from Magnum Pistol Primers to regular pistol primers (all Winchester) and my 40 s&w loads changed from making minor to missing by 50 fps!!

I am new to the USPSA scene and the reloading arena. I thought I had found a nice 40 load. 2.9 Clays, 180 Berry's RS, seated at 1.12...worked great-130PF. Then I ran out of the primers that came with my "used loader deal" and purchased Winchester primers. These were brass color instead of silver. Loaded around 100 rounds and since I live in the country, went out the back door and chrono'd the loads. My XD Tactical would not cycle the rounds even with the 15 pound spring that I installed, Failure to eject, Failure to feed...I had no idea that a primer could make this difference. Anyone else ever experience this much change or should I question my press or powder scale?

I have never tried magnum primes but I might now my Xd won't work under 145 pf with a 16# spring

My load is 3.2 tite group 1.125 seat and 185 percision molys

[JoshF]

I have never tried magnum primes but I might now my Xd won't work under 145 pf with a 16# spring

My load is 3.2 tite group 1.125 seat and 185 percision molys

Maybe KS-shooter is on to something with those WSPM! I fired probably 20rnds of almost that exact same load that KS-shooter loaded and it cycles my stock sprung XD 40 Tactical.

3.2 TG, 180 Berry's RS, 1.125 OAL, w/WSPM and a stock XD spring (22#?)

Edited November 3, 2006 by KSmoker

[R/T Performance]

I have never tried magnum primes but I might now my Xd won't work under 145 pf with a 16# spring

My load is 3.2 tite group 1.125 seat and 185 percision molys

Maybe KS-shooter is on to something with those WSPM! I fired probably 20rnds of almost that exact same load that KS-shooter loaded and it cycles my stock sprung XD 40 Tactical.

3.2 TG, 180 Berry's RS, 1.125 OAL, w/WSPM and a stock XD spring (22#?)

Stock is 18#'s

3.2 should be right around 140-150 pf mark.3.0 with my 16# spring the brass kinda just dribbles out

If I could get down to the 130 mark without slide lightening I would stick out another year in production thinking L10 though major scoring really helps my lazy follow up shots

[ks-shooter]

I thought the stock spring on the Tactical was 22#. I guess I need to check that. With TG I used 3.5TG to get the 140-150PF (averaged exactly 145) again Magnum primer. Scale problem?

I still like the slower/softer feel of the Clay's although I know I cannot use it to make any Major loads. The brass does better than dribble out, but it does not go far. I use a Wolff progressive 15# spring. 14# works, but can still come out of battery a little too easily.

Edited November 3, 2006 by ks-shooter

[R/T Performance]

I thought the stock spring on the Tactical was 22#. I guess I need to check that. With TG I used 3.5TG to get the 140-150PF (averaged exactly 145) again Magnum primer. Scale problem?

I still like the slower/softer feel of the Clay's although I know I cannot use it to make any Major loads. The brass does better than dribble out, but it does not go far. I use a Wolff progressive 15# spring. 14# works, but can still come out of battery a little too easily.

I been using the straight rate sprinco 16 or 18 wolf.

I will got back and check my load date I never tried clays tite group is so cheap and I use in both 40 and 45 I tried universal but it won't burn in minor loads leaves tons flakes

[ks-shooter]

[i been using the straight rate sprinco 16 or 18 wolf.

I will got back and check my load date I never tried clays tite group is so cheap and I use in both 40 and 45 I tried universal but it won't burn in minor loads leaves tons flakes

Clays shoots "soft". It is a push. I believe the Magnum primer must help with the burning of the powder. I do not have flakes left. I got TG because my son wanted a snappier minor load. Clays is also cheap when used with Magnum primers I was only using 2.9 and the cost was comparable to TG. Maybe 10% more because of the 14oz bottle.

By the way, Nice video link.

[10mmdave]

Does this sound crazy to anyone else but me.

I accidently went from Magnum Pistol Primers to regular pistol primers (all Winchester) and my 40 s&w loads changed from making minor to missing by 50 fps!!

I am new to the USPSA scene and the reloading arena. I thought I had found a nice 40 load. 2.9 Clays, 180 Berry's RS, seated at 1.12...worked great-130PF. Then I ran out of the primers that came with my "used loader deal" and purchased Winchester primers. These were brass color instead of silver. Loaded around 100 rounds and since I live in the country, went out the back door and chrono'd the loads. My XD Tactical would not cycle the rounds even with the 15 pound spring that I installed, Failure to eject, Failure to feed...I had no idea that a primer could make this difference. Anyone else ever experience this much change or should I question my press or powder scale?

I've seen a difference of 5 pf between Fed Mag and regular Fed primers using all the same

stuff (same charge of Titegroup, Starline brs, Zero 125 JHP, 38 spcl)

I've seen a difference of 8-10 pf from new/once fired to 10+ loadings of Starline brass.

And yes, I have seen a difference between primers.

When you change a component always re-check your "stuff" (I learned the hard way )

[ks-shooter]

I've seen a difference of 5 pf between Fed Mag and regular Fed primers using all the same

stuff (same charge of Titegroup, Starline brs, Zero 125 JHP, 38 spcl)

I've seen a difference of 8-10 pf from new/once fired to 10+ loadings of Starline brass.

And yes, I have seen a difference between primers.

When you change a component always re-check your "stuff" (I learned the hard way )

Dave, thanks for the "you are not the first one to do that" comment. I just thought a primer was a primer. I am learning. Hopefully, without any true pain......

[HI5-O]

I got a case of mag pistol primers free and there was a difference of 40-50 fps in my loads of .40.

No problems, just download a bit and all is well.

barry

[open17]

On my old minor 40 production load---3.2 N310 under a 180, OAL 1.140, I noticed an

increase of maybe 10 fps when I went from WSP to WSPM primers. The thing that was

more interesting was that my extreme spread reduced by about 75%. I suspect that

the WSPM primers give a more consistent ignition.

[JoshF]

On my old minor 40 production load---3.2 N310 under a 180, OAL 1.140, I noticed an

increase of maybe 10 fps when I went from WSP to WSPM primers. The thing that was

more interesting was that my extreme spread reduced by about 75%. I suspect that

the WSPM primers give a more consistent ignition.

I think you are right, I kept reading how Clays in a minor .40 made for some excessive spreads speed wise. We didn't notice much of a spread beyond what Tite Group had while using the Clays with the WSPM primers.

[ks-shooter]

Barry, thanks for the input. That makes me feel better because that is very close to the change I experienced.

Well, Open17, it looks like my son (KSmoker) answered your response for me while I was away. He is the TG shooter and I will stay with the Clay's loads. Thanks for the input.

Edited November 4, 2006 by ks-shooter