Jump to content
Brian Enos's Forums... Maku mozo!
Bwidpa

How short OAL for CZ shadow?

Recommended Posts

Just got my first CZ (shadow custom from CZC).  I'm used to loading my 147s to 1.14 OAL for an M&P Pro. Went to reload for the CZ and it wouldn't pass the plunk test with anything longer than 1.09 using BBI 147s.  Xtreme and Everglades ammo 147 both pass the plunk test with my normal load at 1.14.  I have a case of BBI sitting around and would like to use them, and I've tended to get better accuracy with coated vs plated out of my other guns.  Just wanted to see if anyone else is going that short in their shadows? And if so how much are backing off the powder(if any)? I'm using titegroup in these loads. Not looking to ream the barrel just yet. Thanks in advance

Share this post


Link to post
Share on other sites

Normal for Shadow 2 from everything I’ve seen on here. I just bought one and the previous owner to me the same 1.090 oal


Sent from my iPad using Tapatalk

Share this post


Link to post
Share on other sites

If you're using the current 147 bbi iteration, the bullet ogive is noticeably fatter at the base and does not taper as aggressively as the old lube grooved version. To load longer with bbis, you'll need to ream the chamber with a finishing reamer or use a fp bullet with a sharper ogive or RN.

Share this post


Link to post
Share on other sites

yes, with different 147 bullets i load at 1.080" oal. not uncommon at all.

Share this post


Link to post
Share on other sites

I load to 1.09 for my Shadow with a FMJ 147gr bullet. Don't worry about the short length, use the OAL that works for the bullet/barrel combination. You might be able to drop the load a little but I would chrono first to see what you get before modifying the charge. Prior to getting my Shadow I loaded the same FMJ 147gr bullet to 1.135 with 3.6gr of Titegroup. When I shortened the OAL to work in my Shadow I really didn't see a difference at the chrono, maybe 10 fps, which is negligible.

Edited by 4n2t0

Share this post


Link to post
Share on other sites

In my experience CZs need to be loaded a bit shorter than most. I run BBI/Bayou 135s (9mm) at 1.08-1.09.

 

While dropping the OAL may not be a big deal, I'd still chrono and test the new rounds just to be sure.

Share this post


Link to post
Share on other sites

It is about the bullet. Shooting SNS 147 tc my CZ's like 1.15. 

 

3.2 titegroup at 1.15 gives me about the same velocity as 3.0 at 1.12. Not sure what would happen if I went to 1.05, would not expect the powder to velocity relationship to necessarily be linear. 

Share this post


Link to post
Share on other sites

Myself and several others I personally know have had our chambers opened a bit to accept longer OAL in our shadows

Share this post


Link to post
Share on other sites

I run all my bullets at 1.1 for Shadow and Shadow 2, regardless of weight, so far in 9 if my own guns as well as a hundred or so other guns, no problems

Share this post


Link to post
Share on other sites

I've tried several different bullets with my CZ. With MG 115 JHP, I had to load at 1.085, with MG 147 FMJ I had to load the same. With some home cast 147's, I could load out to 1.150, and with PD 147 FMJ's, I could load out to 1.150. It all depends on the bullet ogive. My current load is 3.5 N320 with a PD 147 FMJ @ 1.150, gives me. 134 PF.

Share this post


Link to post
Share on other sites
On 12/20/2017 at 4:54 PM, Bwidpa said:

Just got my first CZ (shadow custom from CZC).  I'm used to loading my 147s to 1.14 OAL for an M&P Pro. Went to reload for the CZ and it wouldn't pass the plunk test with anything longer than 1.09 using BBI 147s.  Xtreme and Everglades ammo 147 both pass the plunk test with my normal load at 1.14.  I have a case of BBI sitting around and would like to use them, and I've tended to get better accuracy with coated vs plated out of my other guns.  Just wanted to see if anyone else is going that short in their shadows? And if so how much are backing off the powder(if any)? I'm using titegroup in these loads. Not looking to ream the barrel just yet. Thanks in advance

 

Ream the barrel. I cut my Walthers (which have equally short chambers) to take fat-nosed pills out to 1.160”

 

Life is good now. With a long 147gr bullet shoved that deeply into the case, I was getting a fair number of case gauge failures because the sides of some older brass would bulge while loading.

 

Send it over to a shop like Patriot Defense or Grams Engineering... or talk to a few of us forum members who can cut it for you.

 

Edited by MemphisMechanic

Share this post


Link to post
Share on other sites

Definitely agree with several others here who have recommended reaming the barrel.  Any good 'smith can do it, it takes just a minute or two, and is not expensive.  Just a little goes a long ways and saves lots of headaches.

Share this post


Link to post
Share on other sites

Maybe someone already posted it, but why don’t you change bullets?

 

My son shoots CZ Shadow 2 and Sp01 and I shoot Tanfoglio S2. Both of these require a very short OAL with both Eggleston RN and BB RN bullets, 1.08. We switched to ACME 147 FN, my son’s favorite, and I use PD 147 FMJ RN. Both of these bullets easily load at 1.14 in all our guns without reaming. 

 

BTW switching bullets and loading longer solved the bulging problem with CBC brass because of the depth the bullets were seated to.

 

Also this is getting to be an old thread. 

 

 

Edited by HesedTech

Share this post


Link to post
Share on other sites

I have been shooting 147FN, 1.149coal, but I'm switching to 124s because they have less recoil and the gun seems to like them just as well.  JD

Share this post


Link to post
Share on other sites

I noticed my tango has to be 1.112 or smaller with blue bullets round nose!

Share this post


Link to post
Share on other sites

I noticed that I had to load significantly shorter 1.12 for my S2 where I can push out to 1.15 or maybe even longer with the SP-01 Shadow. 

Share this post


Link to post
Share on other sites
On 12/25/2017 at 9:42 AM, muncie21 said:

In my experience CZs need to be loaded a bit shorter than most. I run BBI/Bayou 135s (9mm) at 1.08-1.09.

 

While dropping the OAL may not be a big deal, I'd still chrono and test the new rounds just to be sure.

I load Bayou 135's at 1.130 in all my CZ's, I have to load the 105's at 1.030, and my 124 PD JHP at 1.080

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...