[kluthe]

I really do get what’s happening here..that its due to the shape of the bullet. The variable chamber thing I think could, due to the bullet shape (dimensions) be a factor. However, if we as reloaders make some vague attempt to follow SAAMI standard while we reload, it stands to reason the component maufacturers have some rationale to maintain those standards as well. The MIN length by SAAMI for a 9MM cartridge is 1.095 in. That minimum..certainly a far cry from the 1.060 folks are attesting to here. And, the maximum SAAMI is 1.169in. Which..who the heck would do that (at least from this blog). Are we saying here that some of these chambers won’t accept factory white box 115 ? Do you do “plunk tests” when you go to the range with a box of white box ? I really doubt it. By the way, yes, I know that many munitions folks (Hornady at 1.060 and Sierra at 1.090) load some of their ammo outside of that standard and I understand the rationale, but how can ammo pundits and keyboard warriors excoriate the sittin’ at the table reloader when said reloader goes outside the “box” It appears we all do ! Why is there a standard? I dunno….

[kluthe]

Keith,
I’m curious what powder and load you are using…just for research on my part. I have seen that RMR seems to need to run deeper however most JHP’s that I see indicate greater than 1.1… most of my loads are running at 1.125 with Speer, berry, MGold, and a wide variety of powders. As well, that’s running from various chambers. The deepest I see would be XTP’s and some various plated bullets. I suppose the ogive on the nuke needs to seat deeper but as you know, the deeper you go the pressure goes up. So what I don’t know is what the reference point is for “unknown” COAL as folks like Berry and RMR do not suggest any loading data. The general rule being to start low and work your way up. But, what is low ? Isn’t it possible to get it too low and end up with a squib that you hope to catch ? Hopefully, you’ll see the signs if its too high or before its way too high.
So I suppose my question is, how did you get to a OAL of 1.075 ? Was it using bullets of similar design? Or was it starting at where the chamber would pass the “plunk” and working up or down from there ? I find this fascinating as the 9mm being a straight wall case, chambers on the case mouth. Again, working through my own loads and am just curious.

[kluthe]

Well, Ruger does make a Blackhawk that has a 38/357 cylinder with an added 9mm cylinder if that’s any indication. At least they used to.. Now, the problem would be finding a load data for that 115. Jacketed stuff I see is .357 (for 38 special) and .355 for 9mm.

[kluthe]

I dont use Autocomp but just for grins I looked at various load sources I do have (via powder, bullet manuf etc) and I can’t find any load seated at that OAL. Curious how or why you started at that load…I suppose you have a fair amount of experience with the powder ?

[kluthe]

perhaps a little late here but… Hodgdons seems to indicate that the min load for 1.11 OAL is 5.1gr of silhouette (this for a Rainier 124gr JHP. On a well broke in run and gun that might be ok but a new one, not so sure. I’d be more afraid of a squib. I’m thinking taking it down to 1.090 will certainly make you feel that 5.0gr. Likely around 1100…but not in a +p range. Mind you I have not yet loaded the nukes as yet. Just go a batch in and am researching where I want to start. I typically stay in the close to max at std pressure loads.

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