AR15.Com Archives
 5.0 gr of Bullseye for 115 FMJ 9mm ?
ANGST  [Team Member]
4/4/2010 2:00:22 PM
Lee manual lists this load. Other manuals are listing in the load in the 4.6 range . Anyone run this ?

Think it's too hot ? Guns used will be 92FS Centurion and a Glock 19
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Coop4570  [Team Member]
4/4/2010 2:51:45 PM
depending which source you look at that is at or over a max load.

Alliant shows 4.7gr for a 115gr GDHP as max.

I'd start 10-15% lower and work up.
RIPRonReagan  [Member]
4/4/2010 7:47:21 PM
Originally Posted By ANGST:
Lee manual lists this load. Other manuals are listing in the load in the 4.6 range . Anyone run this ?

Think it's too hot ? Guns used will be 92FS Centurion and a Glock 19


I use starting-mid loads in my 9mm plinking stuff.

A lot of people don't realize that the 9mm is a fairly high pressure round (35,000 PSI) and things can go north in a hurry.

I don't make many 115s, but when I did, my go to load was 4.8 grains of WW231, so intuition would tell me that your load is pretty close to max.

Question you need to answer for yourself is: Why are you using a hot load with a plinking bullet?

ANGST  [Team Member]
4/4/2010 9:22:16 PM
I use a Lee Auto disk , the next size down is 4.6gr . I will start there and see how the guns like it.
Coop4570  [Team Member]
4/4/2010 9:38:56 PM
Be sure to check your auto disk thrown charge with a scale, the auto disk cavities don't always throw the listed weight.
ANGST  [Team Member]
4/4/2010 9:43:34 PM
Originally Posted By Coop4570:
Be sure to check your auto disk thrown charge with a scale, the auto disk cavities don't always throw the listed weight.


Always

I was hoping to use 5.0gr of Bullseye since that's what I load in .45 and .40 too.
xdoctor  [Team Member]
4/4/2010 10:23:26 PM
My standard load for 9mm is 4.5grn of Bullseye and a 115grn FMJ. Its stout by 9mm standards and I wouldn't go over it.
str8shuutr45  [Team Member]
4/6/2010 5:44:21 PM
I use 3.8 grs Bullseye and a 115 gr plated round nose like Berry's or Rainier. I shoot this combo all day long out of my 16" 9mm AR. I think that 5.0 grains is too hot...try a few but look for the tell tail signs like bulging/cracked cases and primer flowing. I'd start low and work your way up...would suck to blow up your handgun because you wanted to keep the setting the same on your powder measure.
machinisttx  [Team Member]
4/6/2010 10:30:13 PM
5.0 sounds hot. IIRC, the old bullseye load in .38 was 3.8 grains.....and that's with a larger case. Even without looking at load data I think you're going to be at or over max pressure.
cray6031  [Team Member]
4/6/2010 10:54:26 PM
Originally Posted By str8shuutr45:
I use 3.8 grs Bullseye and a 115 gr plated round nose like Berry's or Rainier. I shoot this combo all day long out of my 16" 9mm AR. I think that 5.0 grains is too hot...try a few but look for the tell tail signs like bulging/cracked cases and primer flowing. I'd start low and work your way up...would suck to blow up your handgun because you wanted to keep the setting the same on your powder measure.


Huh, I use 4.3 Bulls and 125 grn LRN and it barely works the action of my Glock 17.

ANGST  [Team Member]
4/7/2010 7:57:58 AM
Originally Posted By machinisttx:
5.0 sounds hot. IIRC, the old bullseye load in .38 was 3.8 grains.....and that's with a larger case. Even without looking at load data I think you're going to be at or over max pressure.


I'd have to look at the CUP in the Lee manual, but I would doubt they would publish a load that was over max.
Hoppy  [Team Member]
4/7/2010 8:54:25 AM
My load for that combo is 4.8gr of Bullseye. I get great accuracy and pretty close to WWB velocity.
str8shuutr45  [Team Member]
4/8/2010 6:27:03 PM
Originally Posted By cray6031:
Originally Posted By str8shuutr45:
I use 3.8 grs Bullseye and a 115 gr plated round nose like Berry's or Rainier. I shoot this combo all day long out of my 16" 9mm AR. I think that 5.0 grains is too hot...try a few but look for the tell tail signs like bulging/cracked cases and primer flowing. I'd start low and work your way up...would suck to blow up your handgun because you wanted to keep the setting the same on your powder measure.


Huh, I use 4.3 Bulls and 125 grn LRN and it barely works the action of my Glock 17.



Yeah, the reason it works in the AR is that the action is completely blow back. Once the powder ignites, the opposite force that pushes the bullet down the barrel pushes the bolt back until it bounces off the buffer and jbuffer spring in the stock. There is more than enough force to propel the bolt. In your Glock, that same force has to unlock the barrel working against the heavy double recoil spring to move the slide rearward. The recoil spring in the Glock not only tames the recoil but also acts to push the slide forward to lock the barrel back into battery. You know that without the recoil spring the slide would not go forward without help. Therefore you need much more force to work the Glock mechanism than the AR blowback, straight line motion, of the bolt carrier in the upper receiver tube.

cray6031  [Team Member]
4/8/2010 9:39:51 PM
Originally Posted By str8shuutr45:
Originally Posted By cray6031:
Originally Posted By str8shuutr45:
I use 3.8 grs Bullseye and a 115 gr plated round nose like Berry's or Rainier. I shoot this combo all day long out of my 16" 9mm AR. I think that 5.0 grains is too hot...try a few but look for the tell tail signs like bulging/cracked cases and primer flowing. I'd start low and work your way up...would suck to blow up your handgun because you wanted to keep the setting the same on your powder measure.


Huh, I use 4.3 Bulls and 125 grn LRN and it barely works the action of my Glock 17.



Yeah, the reason it works in the AR is that the action is completely blow back. Once the powder ignites, the opposite force that pushes the bullet down the barrel pushes the bolt back until it bounces off the buffer and jbuffer spring in the stock. There is more than enough force to propel the bolt. In your Glock, that same force has to unlock the barrel working against the heavy double recoil spring to move the slide rearward. The recoil spring in the Glock not only tames the recoil but also acts to push the slide forward to lock the barrel back into battery. You know that without the recoil spring the slide would not go forward without help. Therefore you need much more force to work the Glock mechanism than the AR blowback, straight line motion, of the bolt carrier in the upper receiver tube.

Well, I guess I kinda knew all of that, but I guess my calculations were wrong. I was thinking the it would take more force to push the bolt back with a buffer and recoil spring which would cause short stroking, guess I was wrong. Thanks for the clarification. FWIW I cant wait to get my hands on a Spikes 9mm upper. Do you shoot any lead through it?



InfiniteGrim  [Member]
4/8/2010 10:10:06 PM
I use 4.1-4.2gr Bullseye in 115gr plated Berry's RN load. I use 3.8gr in a 124gr JHP Berry's plated, and the 3.8gr is noticeably hotter.

I myself am scared of bullyseye so i wont go over 4.4-4.5gr with 115gr, but then again im using bullets that are close to cast which require lighter loads.

Now i think that 4.2 gr of Bullseye is a little weak though because at 50 yards im hitting almost 2 feet low, and at 100 yards im hitting 10 feet infront of the target!
str8shuutr45  [Team Member]
4/8/2010 10:12:57 PM
Originally Posted By cray6031:
Originally Posted By str8shuutr45:
Originally Posted By cray6031:
Originally Posted By str8shuutr45:
I use 3.8 grs Bullseye and a 115 gr plated round nose like Berry's or Rainier. I shoot this combo all day long out of my 16" 9mm AR. I think that 5.0 grains is too hot...try a few but look for the tell tail signs like bulging/cracked cases and primer flowing. I'd start low and work your way up...would suck to blow up your handgun because you wanted to keep the setting the same on your powder measure.


Huh, I use 4.3 Bulls and 125 grn LRN and it barely works the action of my Glock 17.



Yeah, the reason it works in the AR is that the action is completely blow back. Once the powder ignites, the opposite force that pushes the bullet down the barrel pushes the bolt back until it bounces off the buffer and jbuffer spring in the stock. There is more than enough force to propel the bolt. In your Glock, that same force has to unlock the barrel working against the heavy double recoil spring to move the slide rearward. The recoil spring in the Glock not only tames the recoil but also acts to push the slide forward to lock the barrel back into battery. You know that without the recoil spring the slide would not go forward without help. Therefore you need much more force to work the Glock mechanism than the AR blowback, straight line motion, of the bolt carrier in the upper receiver tube.

Well, I guess I kinda knew all of that, but I guess my calculations were wrong. I was thinking the it would take more force to push the bolt back with a buffer and recoil spring which would cause short stroking, guess I was wrong. Thanks for the clarification. FWIW I cant wait to get my hands on a Spikes 9mm upper. Do you shoot any lead through it?





Oh, man you will love the 9mm..I have a RRA upper that I bought from ADCO last fall on a Spike lower with a Spike's mag block. After some tweaking of mags - I use the cheapy Cproducts mags- it runs like a dream. I dare say it's my favorite AR. I have not shot lead through it because most of the shooting I have been doing is indoors. I may pick up some lead 115 gr RN this summer since I'll be outdoors most of the time. I use Rainier and Berrys. I always keep an eye out on sales and the ee. I recently picked up 1K rds from someone on the ee for $75. I like the light loads because using the RRA buffer it runs fine, I use less powder, and it doesn't beat the rifle up (or me, I was really surprised how much the 9mm recoils compared to the 5.56/.223). The one advice I will give you is to not use the heavy Spikes buffer. You will have fits because it is too heavy unless you shoot full auto. If you stick to semi the RRA 9mm buffer is fine.
Enjoy you G17 and your 9mm reloads - I love both my G19 and my 9mm AR. Keep us posted when and if you get your 9mm set up.

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