mofosheee Posted March 22, 2020 Share Posted March 22, 2020 Hello Forum; I'm using AA#2 for Hornady 115gr HP's. This particular bullet / powder combo is not listed in the Western Powders load manual. Am I correct in understanding the following as a general rule for all reloading? "for a particular powder one can safely use data for the same weight FMJ as long as they start about 10% below maximum and work up to a safe load" The COAL's for my barrel plunks fine at 1.075" and anything longer doesn't work. Published COL is 1.100 which throws everything out the window and puts me in unsafe territory (or am I overthinking?) From the Western table; 115 SIERRA FMJ 3.7gr 971fps 4.6gr 1,088fps 34,202psi 1.100COL Thanks all! Link to comment Share on other sites More sharing options...
AHI Posted March 23, 2020 Share Posted March 23, 2020 YES Link to comment Share on other sites More sharing options...
MemphisMechanic Posted March 23, 2020 Share Posted March 23, 2020 You’re thinking correctly. Start at 10% under max and let a chronograph be your guide. Link to comment Share on other sites More sharing options...
mofosheee Posted March 23, 2020 Author Share Posted March 23, 2020 Thanks again! Link to comment Share on other sites More sharing options...
BC17A Posted March 24, 2020 Share Posted March 24, 2020 This page from the Hornady manual might help. Link to comment Share on other sites More sharing options...
MemphisMechanic Posted March 24, 2020 Share Posted March 24, 2020 Also I think you’re up to the same thing I’m up to. I’ve got 600 total rounds to load with 147 and 124 JHPs for “rainy day” ammo. I’ll be running longshot in mine, simply because it’s the only slower-burn powder I have on hand. We won’t talk about charge weight. +P stuff is something I tend to leave off the internet. Link to comment Share on other sites More sharing options...
mofosheee Posted March 24, 2020 Author Share Posted March 24, 2020 Thanks BC17A and Memphis for the great info..........was unable to find the published Hornady data that you attached. I'm relatively new to reloading. My approach to reloading is to scour the net for published data (prefered) ask questions. The range where I can use a chrono is temporarily shut One looming question........... looking at the Hornady chart attached, Why is it not preferable to max out the COL for any particular barrel? I can get dummy Hornady 115gr XTP HP bullets @ 1.16" to chamber and eject just fine in a 9mm. The Hornady chart shows 1.075"Yes I realize velocity changes Link to comment Share on other sites More sharing options...
AHI Posted March 24, 2020 Share Posted March 24, 2020 (edited) #1 the length listed is the length they tested #2 the length listed should fit in all guns chambered in that caliber. Notice I said SHOULD did not say would. #3 provides optimize bullet pull retention. Thar fore optimizes pressure for a "clean" complete burn or the propellant (powder) #1 and#2 are the main reasons Edited March 24, 2020 by AHI Link to comment Share on other sites More sharing options...
mofosheee Posted March 24, 2020 Author Share Posted March 24, 2020 Then 1.075" it is. Thank you Link to comment Share on other sites More sharing options...
zzt Posted March 28, 2020 Share Posted March 28, 2020 On 3/24/2020 at 8:39 AM, mofosheee said: looking at the Hornady chart attached, Why is it not preferable to max out the COL for any particular barrel? Lengthening the OAL over the published load data does two things. It reduces pressure and velocity. Decreasing OAL from published increases velocity and pressure. For max and +P loads, be very careful. .025" shorter OAL in a max 9mm load is a significant difference. In a PCC or a gun with an unsupported chamber, I would quit well below max (.3-.4gr). If it were my barrel I'd spend the $10 to get it throated so it took the longer OAL. Link to comment Share on other sites More sharing options...
mofosheee Posted March 29, 2020 Author Share Posted March 29, 2020 Thanks for the info zzt Understand the OAL issues you cited. Trying to stay out of the no go zones. And yes, I intend to send barrel out as soon as things settle down. Link to comment Share on other sites More sharing options...
MemphisMechanic Posted March 29, 2020 Share Posted March 29, 2020 Also, someday you might buy another gun or give some of the ammo to a friend. This is the kind of ammo that you want to feed in everything. Link to comment Share on other sites More sharing options...
mofosheee Posted March 29, 2020 Author Share Posted March 29, 2020 1 hour ago, MemphisMechanic said: This is the kind of ammo that you want to feed in everything. I'm seeing that. Thank you! Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now