Pierced primer?

[bollocksflower]

Hello all, I'm a newbie to reloading but have been having a go at loading some 70gr 223 rounds for my CZ 527 carbine which likes a heavier bullet. I loaded 5 rounds up using once fired PPU brass, 20.5gr Benchmark 2 powder (as per ADI starting load specs), Remington 6.5 primers and Speer 70gr soft point bullets. Because I'm new to this I decided to only load 5 and to use my cheap 223 - a Howa 1500 short action with the same 1:8 twist as the 527.

The only variation I made compared to the ADI load data was to seat the bullet slightly further down so as to match the overall length to what I'd been using previously. The bolt closed ok, they all fed OK and appear to have grouped well, but 2 did send a small amount of smoke out past the bolt/chamber. The brass looked fine, I've had case ruptures before and it wasn't at all violent like that, but I did notice the my primers appear to have a tiny hole in them.

Could someone please elaborate on this issue? Ive not experienced it before and don't want to continue loading the way I am if it's user error. The bolt face shows no sign of burning or damage, and when I get home I'll inspect the chamber and firing pin.

Pic of the two primers in question attached.

Thanks.

[animalpest]

The brass was shot in the CZ 527 and was then reloaded and fired in your Howa?
Did you full length resize?

[bladeracer]

ADI's data for the Speer 70gn SP is a COAL of only 2.140", already .120" shorter than a standard .223 round. Are you saying you're seating even deeper than this?

I believe Rem 6-1/2 primers have a warning on them not to use them in .223Rem?

Hello all, I'm a newbie to reloading but have been having a go at loading some 70gr 223 rounds for my CZ 527 carbine which likes a heavier bullet. I loaded 5 rounds up using once fired PPU brass, 20.5gr Benchmark 2 powder (as per ADI starting load specs), Remington 6.5 primers and Speer 70gr soft point bullets. Because I'm new to this I decided to only load 5 and to use my cheap 223 - a Howa 1500 short action with the same 1:8 twist as the 527.

The only variation I made compared to the ADI load data was to seat the bullet slightly further down so as to match the overall length to what I'd been using previously. The bolt closed ok, they all fed OK and appear to have grouped well, but 2 did send a small amount of smoke out past the bolt/chamber. The brass looked fine, I've had case ruptures before and it wasn't at all violent like that, but I did notice the my primers appear to have a tiny hole in them.

Could someone please elaborate on this issue? Ive not experienced it before and don't want to continue loading the way I am if it's user error. The bolt face shows no sign of burning or damage, and when I get home I'll inspect the chamber and firing pin.

Pic of the two primers in question attached.

Thanks.

[bollocksflower]

The brass was shot in the CZ 527 and was then reloaded and fired in your Howa?
Did you full length resize?

Actually I'm not sure, it may have been from either of them. I had just been keeping my brass from both, but the CZ doesn't see much use as it doesnt like 55gr rounds, so they're likely from the howa.

ADI's data for the Speer 70gn SP is a COAL of only 2.140", already .120" shorter than a standard .223 round. Are you saying you're seating even deeper than this?

I believe Rem 6-1/2 primers have a warning on them not to use in 223 rem?

I'll have to check my notebook when I get home for OAL but I will update this shortly.

Regarding the primers, I didn't note anything on the packaging and was supplied them by my LGS as appropriate for the round I wanted. I did a quick google and it appears you may be on to something. I'll be really disappointed if that's the issue as I live 200k from the closes supplier and they've always been good...

Thanks for the info. I will still update regarding COAL

[animalpest]

Rem 6 1/2 primers are designed for relatively low pressure and are not suitable for the pressures experienced in .223 loads. And therein most likely lies your problem. Change primers to CCI 450, CCI BR4, Federal 205 or Rem 7 1/2

[deye243]

Looking at that pic I would like to see a pic of the bolt face with it decocked even though they are 61/2 primers that is very low pressure .

[Oldbloke]

Rem 6 1/2 primers are designed for relatively low pressure and are not suitable for the pressures experienced in .223 loads. And therein most likely lies your problem. Change primers to CCI 450, CCI BR4, Federal 205 or Rem 7 1/2

Well, there you go. AP is spot on.
A trap for young players.

IMG_20240613_170922.jpg (132.94 KiB) Viewed 2406 times

[bollocksflower]

Bolt face looks ok, see pic - firing pin had some powder residue but only very little. Spoke to my LGS (local being a relative term ) and they acknowledged that they had supplied the wrong primers and have arranged to replace the batch with Rem 7.5 primers. Pretty pleased with that outcome, but disappointed they suggested it in the first place. Anyway, live and learn.

Thanks to all who commented, most helpful.

Edit - COAL is 2.180, so shouldn't be an issue as I understand it. Happy to be corrected though.

[deye243]

Yep now take the firing pin out so you can see the firing pin just rap a rag around the bolt body and rotate the cocking peice the opposite direction to the cocking notch and don't forget to push in at the same time .

[SCJ429]

ADI's data for the Speer 70gn SP is a COAL of only 2.140", already .120" shorter than a standard .223 round. Are you saying you're seating even deeper than this?

I believe Rem 6-1/2 primers have a warning on them not to use them in .223Rem?

Hello all, I'm a newbie to reloading but have been having a go at loading some 70gr 223 rounds for my CZ 527 carbine which likes a heavier

Thanks.

Nice pick up Blade. Great feedback to the OP.