first major problem since reloading

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cleanview

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Well I took some more test rounds to the range this after noon. I had successfully loaded missouri bullets for my 9mm cz 75b earlier. They were 147 gr bullets. So I made samo varying loads for the 125 gr that I had ordered as well. When I racked the gun to chamber a round, it chambered without closing all the way and would not open. I took it apart and had to pry the bullet out. It would get stuck about 1/16 of an inch before going in all the way. I compared how other rounds lay in the barrel and the new loads would not go in all the way. I came home and measured the diamater where the brass ends and bullet starts and it was the same as other rounds and then the bullet of course was the same measurement and the oal is the 1.121 whic is shorter than the others which are 1.130.

I know I am new but I cant wrap my head around why the bullet is the same measurements wont go in like the others.

Any help?
 
Color it with a sharpy then drop it into you chamber & see where it is contacting.

My guess is you need a little more crimp.
 
So increse the crimp on the already loaded rounds and see if that makes them slide all the way in the barrel. I wil try that when I get a chance but they measurements are all the same, that is what i dont get?
 
In a CZ 9mm with the MBC 125 gr SmallBall bullet, you need to seat the bullet deeper to get a shorter OAL to have the catridge chamber properly.

My notes show that I used an OAL of 1.050.

!! YOU MUST REDUCE YOUR POWDER CHARGE WHEN YOU REDUCE THE OAL !!

This has been discussed before on THR.
Do an search and you can gain from the experience of others who have successfully solved this !

Be Safe and have Fun !
-steve
 
appreciate the comments. they make sence. I could not begin to knpw which words would give the right search. I will try a few in abit

Thanks
 
In a CZ 9mm with the MBC 125 gr SmallBall bullet, you need to seat the bullet deeper to get a shorter OAL to have the catridge chamber properly.

My notes show that I used an OAL of 1.050.

!! YOU MUST REDUCE YOUR POWDER CHARGE WHEN YOU REDUCE THE OAL !!

This has been discussed before on THR.
Do an search and you can gain from the experience of others who have successfully solved this !

Be Safe and have Fun !
-steve

1.080 to 1.050 is the magic OAL for either the 115 or 124 MBC lead RN. The CZ and the Browning HP have very short leades in the barrel chamber so the "fat nose of the RN bullets hits.

http://www.thehighroad.org/showthread.php?t=561887
 
Different nose shape requires OAL change as said above.

Always do the drop test with a new bullet to find max oal.
 
Wow. this is why thos forumn is so great. Read some of the other threads and very informative. There is so much to learn, but I find it very interesting. Thanks for your patience with new people.

Not sure what to reduce the load to. I had 3 diferent loads to figure out where I needed to be. One of the posts from another thread mentioned the same gun with 3.8 hp38 and an oal of 1.080. I am going to pull abunch of bullets apart and do some of the things mentioned. Any input on the trail loads would be great.
 
Here is what I came up with . at 1.095 is where the bullet finally fit and could spin. I read come off of that .01. And at 1.08 is where I am going to give it another shot. The disks on the old lee turret offer a 3.7 load. I usuall make few one setting lower and one higher then shoot the lightest first and work my way up to see what feels best. That would make (i think) a 3.4 and a 4.0. Dont think I will try the 4.0 come to think of it.
 
I guess it isn't important to check to see where the interference is? Maybe just make blind adjustments until something works is a better idea?
 
I guess it isn't important to check to see where the interference is? Maybe just make blind adjustments until something works is a better idea?
__________________
What I do isn't instruction for others. It is only the way I do things. You need to make your own decisions.

Got your nose out of joint king? Perhaps you should abide by your sig line? Others shared their findings, cleanview listened, problem solved.

This made me go measure some 9mm loads I just made with a lee 125 2R lead boolits. I had them set @ 1.075, now I have to see if they will chamber in my cz 75B--------,,,,,,,,. Yup, no problems. Opening the safe, then unstacking the other guns to get one out is a roadblock. It's always the one at the back. So I usually wait till it's range time to find out I'm too long.:eek::(:uhoh:
 
Nope. My nose is just fine. I would like the OP to think a little about what they are doing. I'm pretty sure Cleanview is new to reloading.

Perhaps you should abide by your sig line?
I'm not sure how that relates. Tho what I do isn't the standard I base my decisions off some experience & know the out come or at least the consequences. I can't see from here to tell him what is wrong. I can only make guesses & tell him what to look for. I also don't know how high the pressure is in his cartridge so I don't know if he can seat deeper or not. I would rather he check to find the problem but I can't tell him to & ether way it's Cleanview's hand & gun. Why would my nose be out of joint.
 
As said it's the bullets ogive. I would take the pistol barrel (cleaned) that the reloads will be shot with to the reloading bench and seat the bullets to your starting OAL. Test fit the cartridge to the barrel and reduce the OAL as necessary for the cartridge to insert and drop free easily. I would then reduce the OAL just a few more thousandths and that's the OAL you need to use with that bullet and barrel combination.

I think this is the simplest method to correct the problem. You need to reduce the powder charge if you are seating it deeper.
 
Test fire went good to day. The 3.7 gr of hp38 and oal 1.08 she shot fine. 4.0 was a little hot and 3.4 was a little weak. Been a really good learning experience from this. the advice was already given but I basically did what fuleffect1911 said.

thanks for all the advice. Seems like a lot of the posts are from newer reloaders and I for one much appreciate the tiem it takes to reply.
 
Cleanview, Glad it worked out.
I shoot a 9mm 75B too. It and the XD have a shorter headspace than many other pistols.

That dummy round drop-in test works well. If you "paint" the nose of the new bullet with laundry marker, you can visibly see where its making contact with either the ogive and rifling or with conical nose bullets maybe the bullet side-wall and chamber cone. An "rfwobbly" post has great pics illustrating how and why.

You're in the game and probably 'hooked'. Enjoy

P.S. Those LEE discs are easy to modify for your "favorite" loads. Renumber a modified hole and it will also work with any powder on the charts. The discs are $5 each
 
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+1 with 1SOW. I always build a dummy round (resized brass, no primer, no powder, seated bullet) for a checking fit in the weapons I plan to shoot with a new bullet.
 
My first thought would be to identify the obstructing element before suggesting deeper OAL or crimping more. With either of the corective recomendations, I would deffinitely identify the cause first. The increased crimp can interfere / alter head space, and the deeper seating can / will increase pressures. In my opinion, everyone here had something valuable to offer the OP which resulted in a favorable solution, so far.
 
+1 with 1SOW. I always build a dummy round (resized brass, no primer, no powder, seated bullet) for a checking fit in the weapons I plan to shoot with a new bullet

Correct! This is a very good use for a fired steel case, makes a good dummy round and stands out as a special round, better than a brass case.

I keep mine in the box with the dies per caliber.
 
OCD1 said:
The CZ and the Browning HP have very short leades in the barrel chamber so the "fat nose of the RN bullets hits.

Listen to this man.

I reload for CZs in 9mm, .40 S&W and .45acp. On any bullet that isn't a normal FMJ, I always have to set the bullet deeper than I would for my other guns. CZs have tight chambers and short leads. They can sometimes be a pain in the butt to load for until you get used to their quirks.
 
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