X-Treme 124gr. 9mm

[red rick]

Looking for a little help . What should my COL be with x-treme 124 gr. RN bullets ?

I have HS-6 , Universal and Bullseye powders . I am thinking about using HS-6 , but I can go to the store for something better . I have never loaded 9mm before , just revolvers , .38 to .44 mag. .

Another problem that has me a little worried about using the HS-6 is I am getting conflicting information on the charge , a big difference .

Hodgdon list the starting load at 6.0 and max at 6.6 with a 124 gr FMJ bullet .
Hornady list the starting load at 5.1 and max at 5.9 with a 124 gr. FMJ bullet .

That is scary stuff too me . What is wrong here ?

 

[mstreddy]

I don't use HS6 so I can't comment on the charge weights, but I've loaded over 2100 of the Xtreme 124 gr at 1.12" COAL. As always, start low and work up.
The difference from Hornady to Hodgdon may be the bullet used, the COAL, and plainly what "they" each tested their loads at. I've seen the Hornady loads to be generally lower than the powder company loads. So, what that may mean for you is take a range somewhere in between and go from there. There are some folks here who use HS6 for 9MM. Hopefully they can provide some insight into their loads.

As to other powders, I'm currently using Promo, which uses Red Dot data by weight, and I've used Win231/HP38 as well as WST.

 

[Axis II]

I load the same bullet with hp-38. cant help with OAL as I made a dummy round and colored it and plunked it and gave it a few turns to make sure it wasn't touching rifling. your guy might be different. as far as charge I used hodgdon.com and they use a berry's plated bullet which is the same as extreme and I started low and went up. for me 3.9 was my start and I hit a very accurate and functional charge at 4.0-4.1 for my hp-38. I would start at 6.0 and work up until I got a functional and accurate load. try 6.0 with about 5 rounds and if she functions and shoots good id leave it alone. if not 6.1, 6.2, 6.3. with handgun i load 5 up and try them slow fire incase there is a hiccup and if its good I load 5-10 more and try them slow fire again incase hiccups.

 

[Walkalong]

I loaded them to 1.130 to 1.135 OAL, just like other 115 and 124/5 Gr RN bullets in 9MM. It has worked in a fair number of guns.

HS-6 works very well for full power 115 and 124/5 Gr 9MM loads. Universal will download a little better, and Bullseye will make some nice moderate power plinking/target loads.

Why not go with Hodgdon's online data, they sell it, and they pressure tested it. (Or paid it done.)

That said, 6.8 Grs of HS-6 under a Master Match 125 Gr JSP loaded to 1.122 +/- gave 1087 FPS in a 3" EMP, 1172 in a 4 1/2" TZ, and 1336 FPS in a 16" AR. I don't remember where I got the data, my Speer manual only goes to 6.7. This is definitely a full load, and I would approach it with caution, especially since it is a plated bullet and not jacketed. 6.4 or 6.5 should give you all you want. 5.9 sounds pretty conservative.

 

[slickracer]

I load mine at 1.140 with 3.7 Titegroup.

 

[Wreck-n-Crew]

Just use you barrel as a gauge and do a plunk test to insure they are feeding. Then check them in the magazine. I Have one 10mm that needs a shorter OAL with a 175g SWC to fit the magazine after already plunking fine in the barrel.

Some load data is a little conservative on the load. I've never used HS-6 but the Universal will give you a decent powered load and the Bulls Eye will likely do better in short barrels FME.

 

[trackforever]

Just use you barrel as a gauge and do a plunk test to insure they are feeding. Then check them in the magazine. I Have one 10mm that needs a shorter OAL with a 175g SWC to fit the magazine after already plunking fine in the barrel.

Some load data is a little conservative on the load. I've never used HS-6 but the Universal will give you a decent powered load and the Bulls Eye will likely do better in short barrels FME.

 

[trackforever]

like 5.5 gr. of Hs 6 at 1.145 with 124gr. extreme Rn.

 

[drmrk]

I used 6.0gr HS-6 @ 1.150 under a 124gr. X-Treme plated RN. CCI #500 primers in mixed brass. Chrono 5 shot avg. 967 fps, S.D. 32.9, E.S. 72. in Beretta 92fs. This is a light but accurate load in my guns. I have switched to True Blue Powder because it seems to be cleaner

 

[rfwobbly]

► You will like the accuracy of HS-6, but not the mess it leaves. Look for some Win 231 (aka Hodgdon HP-38), Win WSF, or for general plinking Hodgdon Clays. All those meter very well and shoot much cleaner. The new IMR powders Unequal and Red might also be improvements, but I have not tried them.

► There is no single OAL for auto pistol cartridges. You use your barrel as a gauge to make sure the finished cartridge(s) stays out of the rifling, and that defines your Max OAL. In that sense, your bullet and your barrel define the dimension. If the load data you have shows a shorter OAL, then the load data becomes your Min OAL. You are then free to use any OAL between Max and Min.

You must also understand that 9mm shorter than ~1.00" begin running into feeding issue, and cartridges longer than 1.169" generally won't be accepted by the magazine. This info is all summarized in the cartoon below...

► You are right to be scared. 9x19 Luger is a high pressure cartridge. As such, it is generally considered that changes in OAL over 0.010" start to have meaningful effects on the chamber pressure. Unlike the revolver cartridges you are accustomed to, no load data for an auto pistol cartridge is complete without an OAL. Therefore, no one here can help you decipher the discrepancies in the 2 loads, as quoted. But, the differences are most probably the result of bullet lengths and/or OAL differences.

Hope this helps.

 

[7mmb]

I use the Xtreme 124gr RN in 9mm. I determined OAL by incrementally seating the bullet and measuring the bullet diameter at the case mouth. When the diameter dropped to .354 I knew the entire shank of the bullet was inside of the case with only the ogive outside of the case, just like with factory FMJs. The correct OAL with Xtreme's 124gr RN is 1.135". Any shorter than this and you will be crimping onto the ogive. At this length it will pass the plunk test in any 9mm chamber.