9mm 115 CPRN Xtreme and titegroup COAL question

[webrx]

Hey Folks, I appear to have lost my mind (load is not in my notebook).

I have multiple manuals, and many have loads for 115 gr spr gdhp but not for x-treme CPRN, now, I know 115 is 115, so I should be fine with a minimum load for titegroup of 4.5, what I am missing is Coal for a 4.5 TG load, I though it was 1.125 for cprn, but I cant seem to find it in any of the books. GDHP is 1.125, I am thinking this is the COL i previously used for these, but I apparently did not write it down.

so the question is. 1.15 or 1.25 for 115gr cprn and titegroup at 4.5 or do you have a pet load with TG you like better in 9mm

Any helpers out there?

d

 

[webrx]

I found it in a different book it was actually 4.2 at 1.15 with TG.

however if you have a pet plinking load with 115 RNs and TG I am all ears.

 

[AK Hunter]

Mine looks like min of 4.5 & max of 4.8 at a COL of 1.125

 

[kmw1954]

Hodgdon webpage lists TG with a 115gr lead RN COL 1.10" and start @ 3.9 to 4.3gr

Western Powders list the 115gr Berry's COL @ 1.130"... I have used and have presently both the Berry's and Xtreme 115gr RN and load both to that length.

 

[webrx]

Thanks guys, yeah I saw the GDHP at 1.125 and and the LRN at 1.10 in the hodgdon manual, I just was not sure which COL to use for these Xtreme RNs. GDs have a flat nose and LRNs are not plated, and as usual could not find the specific bullet (Xtreme plated RN) listed in a book so that means best guess, with weight, and minimum loads and work up. and GDHP COL is not apples to apples with PRN.

I have good load data for 45 colt and ACP, 38/357, and all the bullets I use in my different rifles, but to be honest, I have only loaded a small amount of 9mm, I did a batch well over a year ago, with 115 Xtreme, and 124 and 147 Berrys when working up a 124/147 load for the PCC, 9 was so cheap back then I just bought a bunch of bulk 115 RNs for plinking. Now I need to replenish that stock, and with everything going on getting 1000 (or more) in bulk is not an option and the price of 9mm now makes reloading worth it.

d

 

[Charlie98]

I've been loading quite a bit of 9mm lately, too. In fact, I just finished up 750 of them with the last of my Berrys 147 PRN's. What always gives me a pause to question is the listed OAL's... with a high pressure round like the 9mm, where bullet seating depth is quite critical, and particularly with a powder like TiteGroup, I see OAL's all over the map.

 

[kmw1954]

I would just use the OAL of the Cast RN as a reference point as most have pretty much the same profile as the plated. Once again the Berry's RN are identical in shape as the Xtreme,(I use both still) As to the powder charge I would start a couple, .2gr, heavier that the Cast lead because from my experience the cast lead data start point does not always fully cycle a 9mm. Just remember that if you decrease the length you increase the pressure and if you increase the length you decrease the pressure. So either start at the cast lead length or the 115gr Plated Berry's length and adjust to the barrel plunk test.

 

[webrx]

thanks all, I read all the above, but forgot to circle back with a thank you.

Dave

 

[rfwobbly]

Gentlemen -
► The bullet-to-barrel fit ALWAYS determines the COAL for any auto pistol cartridge, not the number in the manual.

► The COAL listed in the load recipe is simply part of the lab report telling you what they did during their testing. It is not a recommendation of what COAL you should be using.

Here's a photo of the "gun" used during testing....


If your handgun looks like that, then you can use the COAL in the manual. If your handgun does not look like that, then you'll need to do some extra fitting and calculating.

Sometimes the listed COAL just happens to work. That is nothing more than a happy coincidence. It is not proof of anything more than you were lucky.
.