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-   -   9mm luger 115 gn plated flat point and COL (http://www.firearmstalk.com/forums/f30/9mm-luger-115-gn-plated-flat-point-col-90295/)

kjdeut 05-07-2013 09:08 PM

9mm luger 115 gn plated flat point and COL
 
I made a mistake and picked up some bullets before doing a little research. My problem is trying to find the correct COL for Berry's 115gn plated flat point bullet. When no data is available how do you figure the proper depth to seat the bullet?
With the 9mm being a small round and seating depth can have a big impact on pressure where do you start? I have read about doing the drop test where you use a dummy round and see how it fits in the barrel and mag but would like to get other ideas/suggestions. I have IMR 7625, Western 231, or Hodgson HP 38 powder available.

Thanks,
Ken

activereality 05-07-2013 09:13 PM

Find a bullet that is similar in weight and type. That coal should work fine. I've done that when ordering several different types of .355 and .40 bullets.

aandabooks 05-07-2013 09:30 PM

Look for data on the same weight and in a HP bullet. You length should be the same. Make sure you check to make sure it fits in the magazine when you make the first one.

mseric 05-08-2013 11:07 AM

COAL,OAL is bullet and firearm specific, not manual specific. Find the longest OAL that fits, feeds and fires in YOUR pistol. Then start low and work up. It's the only way. After all, if it doesn't fit and fire, there is no need to worry about pressure.

locutus 05-08-2013 10:24 PM

Unless you're loading +P, just set your seating die with a factory round of the same weight and don't worry about it.

kjdeut 05-09-2013 04:28 AM

Thank for the responses everyone.

Quote:

Originally Posted by locutus (Post 1241128)
Unless you're loading +P, just set your seating die with a factory round of the same weight and don't worry about it.

I still have a lot to learn about reloading which is why I am asking this question. Would the same weight be the only thing I look for or should it also be the same type of bullet? Also wouldnt the type of powder used make a difference?
Where I am going with this is, for example starting load for powder A fills the casing 50% full while powder B starting load fills it 75% full, wouldn't you have different seating depths (COL) for each powder so you dont over pressure? Or is that what you are getting at when you mentioned loading +P.

Thanks for your help.

mseric 05-09-2013 11:49 AM

It is perfectly safe and acceptable to use data of same weight bullet and similar construction from different manufacturers. An example would be using Hornady 115gr jacketed data with Montana Gold 115gr jacketed bullet. Another would be using Lyman Cast lead 115gr data to load you own cast 115gr bullet.

Quote:

for example starting load for powder A fills the casing 50% full while powder B starting load fills it 75% full, wouldn't you have different seating depths (COL) for each powder so you dont over pressure?
No, not really. Take a look at the load data in your manuals. They list several powders with different "start" charge and "Max" charge for each powder tested, but the OAL is unchanged. They have already done that work for you.

Your plated bullets can be loaded using jacketed data, just use low to mid-range jacketed data found in your manuals.


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