CZinSC Posted May 13, 2011 Share Posted May 13, 2011 I just tested a batch of ammo, and have what looks like flattened primers. How flat is too flat? From the pictures, anything you can see I should be worried about? Just loaded 500 of these up and really don't feel like pulling them, but I will if you think they aren't safe. Not sure how good the picture is, some look a little flatter than picture shows. Background info: Gun: CZ SP01 Powder: N320 4.3gns OAL: 1.145" Primer: WSP Brass: Win, about 4 or 5 times fired FPS: 50 rounds tested, Hi of 1084, Lo of 1042 What do you think? They definitely aren't all flattened, but some stuck out, Specifically: First picture - Top row, 2nd one from the right, Second row, 2nd from left Link to comment Share on other sites More sharing options...
Torogi Posted May 13, 2011 Share Posted May 13, 2011 That looks flat. But no primer flow. what bullet weight? 124gr? I just loaded 3.3gr N320 but im using 147gr. I haven't shot it yet though Link to comment Share on other sites More sharing options...
Powder Finger Posted May 13, 2011 Share Posted May 13, 2011 They look ok, not great. You really want a noticable radius on the edge of the primer. The one in the 1st photo 2nd row middle is ideal, except it's hard to tell from the photo if it leaked gas. The one dirrectly below it is about as flat as you would like to see. Also I don't know about your FP spring or recoil spring but some have a little FP streak on them, like the barrel is unlocking while the FP is still extended. Link to comment Share on other sites More sharing options...
CZinSC Posted May 13, 2011 Author Share Posted May 13, 2011 That looks flat. But no primer flow. what bullet weight? 124gr? I just loaded 3.3gr N320 but im using 147gr. I haven't shot it yet though Knew i was missing something....Montana Gold 124 FMJ They look ok, not great. You really want a noticable radius on the edge of the primer. The one in the 1st photo 2nd row middle is ideal, except it's hard to tell from the photo if it leaked gas. The one dirrectly below it is about as flat as you would like to see. Also I don't know about your FP spring or recoil spring but some have a little FP streak on them, like the barrel is unlocking while the FP is still extended. You think I'm OK shooting these, for a major match? Planning on replacing the FP, recoil, and hammer springs before match (next week). Link to comment Share on other sites More sharing options...
Cody_2130 Posted May 13, 2011 Share Posted May 13, 2011 After staring at primers for over 3 years I would call those good. I would be comfortable using those anywhere. Link to comment Share on other sites More sharing options...
Torogi Posted May 13, 2011 Share Posted May 13, 2011 This is a little drift but not much, one time I used WSPP for 9mm, 7.4gr Autocomp, 1.168 OAL, 124gr JHP MG, (major load) pushing about 1350fps, primer was FLAT, but no flow. Used it for about 5 matches before switching to rifle primers. If its me I would be comfortably okay with your load. Link to comment Share on other sites More sharing options...
Powder Finger Posted May 13, 2011 Share Posted May 13, 2011 (edited) That looks flat. But no primer flow. what bullet weight? 124gr? I just loaded 3.3gr N320 but im using 147gr. I haven't shot it yet though Knew i was missing something....Montana Gold 124 FMJ They look ok, not great. You really want a noticable radius on the edge of the primer. The one in the 1st photo 2nd row middle is ideal, except it's hard to tell from the photo if it leaked gas. The one dirrectly below it is about as flat as you would like to see. Also I don't know about your FP spring or recoil spring but some have a little FP streak on them, like the barrel is unlocking while the FP is still extended. You think I'm OK shooting these, for a major match? Planning on replacing the FP, recoil, and hammer springs before match (next week). You look good to go to me. FWIW when the primer has no radius and flows to fill the chamfer around the pocket(primer looks like a mushroom when removed) then you are way hot. It's not even for sure the flat ones are over pressure. Your at a 135 PF so it could be the gun like a long chamber. I wouldn't worry. Good luck at the match. Edited May 13, 2011 by Powder Finger Link to comment Share on other sites More sharing options...
CocoBolo Posted May 13, 2011 Share Posted May 13, 2011 (edited) Obviously you have never seen a flat primer. Those are fine aka normal looking for 9 minor. When they get flat there is no corner the primer blends to the brass, add some more powder then it looks like the primer strike is a tear, this is when you order the new slide cause your breach face it about to get messed up and your firing pin is going to get stuck. If you are concerned switch to CCI they are a bit harder than WSP, and magnums are even harder but you have to adjust the powder down with the magnum. Yes, I've seen flat primers and primer flow, but have not ruined a breach face. I shoot 4.0gr in my Shadow w/124gr MTG RN at 1.145 @128 pf, tried a bunch of powders with 124gr and find you just can't beat N320. I like the 147gr Zero JHP's, shoots like air soft. Edited May 13, 2011 by CocoBolo Link to comment Share on other sites More sharing options...
Foxbat Posted May 13, 2011 Share Posted May 13, 2011 (edited) Obviously you have never seen a flat primer. Some say these (in my pic) are not the worst... but I would be reluctant to shoot loads like THAT one - to me they are rather FLAT! The primers in the original post pictures all look fine to me. Edited May 13, 2011 by Foxbat Link to comment Share on other sites More sharing options...
OpenDot Posted May 13, 2011 Share Posted May 13, 2011 (edited) This is a little drift but not much, one time I used WSPP for 9mm, 7.4gr Autocomp, 1.168 OAL, 124gr JHP MG, (major load) pushing about 1350fps, primer was FLAT, but no flow. Used it for about 5 matches before switching to rifle primers. If its me I would be comfortably okay with your load. Mine chrono'd 1395fps for 172PF 124mg JHP 1.172 OAL 7.2 AC .375 crimp WSRP Elevation and outside temp maybe? Edited May 13, 2011 by OpenDot Link to comment Share on other sites More sharing options...
lugnut Posted May 14, 2011 Share Posted May 14, 2011 Yeah- those are fine IMO. I shoot 3.8gr W231 with Berrys 147gr 9mm bullets with Federal primers out of my G34.... that are much flatter. I've shot 10s of thousands that way without issue... Almost like the primers posted by Foxbat. Link to comment Share on other sites More sharing options...
rfwobbly Posted May 14, 2011 Share Posted May 14, 2011 (edited) You don't want to go by simply primers alone in gauging chamber pressure. For one thing primers come in different thicknesses/ hardnesses, so that a flattened Federal is normal, whereas a flattened CCI might make me stand up and take notice. Yours look to be Winchester, and as has been said, they look quite normal. The photo above demos (L to R) light, medium and "put the gun down" fairly well. Edited May 14, 2011 by rfwobbly Link to comment Share on other sites More sharing options...
GrumpyOne Posted May 14, 2011 Share Posted May 14, 2011 Yours are fine....I've had them flow back intothe FP hole before, and you are no where near that! Link to comment Share on other sites More sharing options...
Kevin Holman Posted May 14, 2011 Share Posted May 14, 2011 None of those look flat to me. Overseating a primer in the press can make them that flat. Link to comment Share on other sites More sharing options...
lugnut Posted May 14, 2011 Share Posted May 14, 2011 You don't want to go by simply primers alone in gauging chamber pressure. For one thing primers come in different thicknesses/ hardnesses, so that a flattened Federal is normal, whereas a flattened CCI might make me stand up and take notice. Good point. Link to comment Share on other sites More sharing options...
Mat Price Posted June 3, 2011 Share Posted June 3, 2011 get a flat wolf primer and things are getting ready to cut loose.. Link to comment Share on other sites More sharing options...
twodownzero Posted June 3, 2011 Share Posted June 3, 2011 My .357 rounds with W296/H110 are way flatter than all posted in this thread except maybe the .38 Supers and the right most primer in .357 posted above and I don't worry too much. As long as your load is within a reasonable range of what the book says, not too short overall, chronos within a reasonable velocity for the load, and doesn't flatten primers like those .38s above, I wouldn't worry about it at all. Link to comment Share on other sites More sharing options...
Powder Finger Posted June 3, 2011 Share Posted June 3, 2011 Obviously you have never seen a flat primer. Me? I'm pretty sure I've seen/created more flat primer's than most, That only proves that some are blessed to not have the said primer metal on the face. Link to comment Share on other sites More sharing options...
Red Ryder Posted June 4, 2011 Share Posted June 4, 2011 Your pictures are dictionary examples of normal looking primers post firing and your load is in the exceptable range. Link to comment Share on other sites More sharing options...
Steve RA Posted June 6, 2011 Share Posted June 6, 2011 Use small rifle primers. Link to comment Share on other sites More sharing options...
Jaxshooter Posted June 6, 2011 Share Posted June 6, 2011 Look good to go with me also. If you are still concerned take Steve RA's advise and go to small rifle primers. Link to comment Share on other sites More sharing options...
RiggerJJ Posted June 6, 2011 Share Posted June 6, 2011 Use rifle primers to COVERUP over-pressure? not a good practice... jj Link to comment Share on other sites More sharing options...
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