Tight Primers ???

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Joined
Nov 5, 2007
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I bought these primers last year. Winchester Match Grade Small Rifle Primers. I bought them for the 357 Max. Hornaday 10th edition called for Remington small rifle primers (7 1/2), but I never see Remington Primers in the stores around here.

And holy cow, these primers are a tight fit! I just got around to using them yesterday. I prime off the press with one of those RCBS Universal Hand primer tools. With a turret press, it's just easier.

But it was all I could do to squeeze these primers into the cases. They are a copper colored primer, Normally I use CCI primers, and they just pop right in, but I swear, I had to use both hands and squeeze as hard as I could.

Anyone else ever try these primers?

MuK84kHm.jpg
 

Mobuck

Hawkeye
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Dec 25, 2007
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Have noted some variation in sizing of primers/primer pockets for years. Do you have another brand of brass to try? Sometimes that helps.
 

jgt

Blackhawk
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Jul 30, 2008
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Sounds like you could use a small rifle primer pocket uniforming tool.
 
Joined
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Well, I’ve tried other primers and they go in no problem, so I think it’s the primer, not the brass. I’m not sure I’d want to change the brass with a uniformer tool.

And unfortunately I don’t have any other brands of 357 brass, it’s all Starline, only reloaded perhaps 3 times so far.

I’ll just make a note to self to not buy this brand of primers again, only I have about 400 of these primers left. I’ll try them in my 327 brass, that isn’t Starline….
 

Johnnu2

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Jun 26, 2003
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1,616
Kevin, I think it is the primers fer sure.... I've had that problem with some primers in the past although I can't recall the brands (it was not the ones you show); I just squeezed them in and went to the range.

As an FYI, I use primer pocket uniformers all the time; I actually use them to clean out my primer pockets for residue. At the same time, they true-up the base of the primer pocket. Yes, they do take away material but in the bazzillion years I've been cutting with them, I've never had a case failure. And, NO, they won't help you with this problem of tight primers, but you will have some clean and true pockets.

J.
 
Joined
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Messages
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Johnnu2 said:
As an FYI, I use primer pocket uniformers all the time; I actually use them to clean out my primer pockets for residue. At the same time, they true-up the base of the primer pocket. Yes, they do take away material but in the bazzillion years I've been cutting with them, I've never had a case failure. And, NO, they won't help you with this problem of tight primers, but you will have some clean and true pockets.

J.

Thanks, perhaps I'll look into one. I've been going to Scheels lately, in my opinion, it's just a bit nicer than Cabelas. Actually quite a bit. They have some reloading stuff in stock. It's where I've gotten primers and powder in the past year or so. I'll go see what they have for case prep.
 

kmoore

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Mar 29, 2017
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1,037
I found the same problem with Win lg rifle mag primers last week.
I have loaded about 400 Weatherby cases in 7mm wby mag with Fed lg rifle mag. and shot them over the last year. I have 2 thousand plus WLRM primers and with only 2 hundred Fed 215Ms left, I wanted to load some up and test them. They are really tight in the Weatherby cases. I do not like it. I pulled them before even shooting them. I have a primer pocket tool and am going to run them through it and see if that helps. If not wait for more Fed or CCI primers.
In the recent past I have used the WLRM primers in 7mm rem mag cases of Remington and Winchester also 338 RUM in Nosler and Remington cases and never had them be so damn tight to seat.
They may work just fine ,but when it takes about all I have in strength to hand seat a primer I just do not like it.
Just me, but I quit using the rams on any press to seat a primer decades ago. I like the hand tools so I can feel the primer seating. I crushed primers using the ram on both RCBS and Redding presses. Never on a hand tool.
 

Johnnu2

Buckeye
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Jun 26, 2003
Messages
1,616
kmoore.... agree 100%
"They may work just fine ,but when it takes about all I have in strength to hand seat a primer I just do not like it.
Just me, but I quit using the rams on any press to seat a primer decades ago. I like the hand tools so I can feel the primer seating. I crushed primers using the ram on both RCBS and Redding presses. Never on a hand tool."....
YUP, am running out of the strength I used to have... it does hurt in many ways :)

J.
 

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