Catpop
Member
Aside from the increased possibility of barrel leading, is there another reason to not directly substitute FMJ loading data for LRN reloading?
Thanks for info!
Thanks for info!
Try the Hodgdon web site. Their reloading data shows both lead and jackets bullets using WSF. I personally have no experience with it.My current inability to find any 9mm 115 gr LRN for WSF data led me to ask the question.
If you have a source for this data please share it with me. I really need it.
In situations like this, I usually reduce FMJ data 10% as a starting point for same weight boolits.
My current inability to find any 9mm 115 gr LRN for WSF data led me to ask the question.
If you have a source for this data please share it with me. I really need it.
In situations like this, I usually reduce FMJ data 10% as a starting point for same weight boolits.
Consider this.Aside from the increased possibility of barrel leading, is there another reason to not directly substitute FMJ loading data for LRN reloading?
When I am conducting load development for bullet weight I cannot find load data for, I will reference load data for slightly higher bullet weight.My current inability to find any 9mm 115 gr LRN for WSF data led me to ask the question. If you have a source for this data please share it with me. I really need it.
In situations like this, I usually reduce FMJ data 10% as a starting point for same weight boolits.
Thank you for taking the time to help me.Consider this.
Before the advent of jacketed bullets, all bullets were made from lead. And as velocity increased, to reduce leading, lead was alloyed harder and harder (BHN 10 all the way to BHN 22-24). But when harder lead alloy did not fully address the leading issue even after sizing the bullet diameter .001"-.002"+ larger than groove diameter of the barrel, gas checks that covered the bullet base were used to not only address leading issues but to prevent gas cutting/bullet base erosion from high pressure gas.
And what are modern jacketed/plated bullets? They are all lead/alloy bullets with full-length gas checks.
When I am conducting load development for bullet weight I cannot find load data for, I will reference load data for slightly higher bullet weight.
Here are Hodgdon and Speer lead/plated/jacketed load data for 115/124 gr bullets and WSF - http://www.hodgdonreloading.com/data/pistol
- Hodgdon 115 gr FMJ WSF Dia .355" COL 1.169" Start 4.9 gr (1,060 fps) 24,200 PSI - Max 5.7 gr (1,195 fps) 31,900 PSI
- Speer 115 gr TMJ WSF Dia .355" OAL 1.135 Start 5.0 gr (1041 fps) - Max 5.6 gr (1156 fps) - https://www.speer-ammo.com/download...m_caliber_355-366_dia/9mm_Luger__115_rev1.pdf
Had you used 10% reduction of jacketed load data for 124 gr Lead RN, you would have ended up with start/max charges of 4.23 gr/4.77 gr when published lead load data start/max charges are 4.0 gr/4.7 gr. Using 12% reduction of jacketed load data produces start/max charges of 4.13/4.66 gr which I think better reflects published lead load data without going over max.
- Hodgdon 124 gr Lead RN WSF Dia .355" COL 1.169" Start 4.0 gr (945 fps) 22,200 PSI - Max 4.7 gr (1,055 fps) 27,300 PSI
- Hodgdon 124 gr FMJ WSF Dia .355" COL 1.169" Start 4.7 gr (1,015 fps) 27,700 PSI - Max 5.3 gr (1,115 fps) 32,700 PSI
Another key factor is OAL, or more specifically, bullet seating depth as Lead RN bullets tend to be loaded shorter like 1.125" OAL compared to 1.130" for 115 gr FMJ/RN for me.
So using 12% reduction of more conservative plated load data that uses shorter 1.135" OAL, we get start/max charges of 4.4 gr/4.9 gr. If your OAL of 115 gr Lead RN is shorter (and likely larger sized at .356" - Note that Hodgdon used smaller .355" sized 124 gr Lead RN for their testing), I would just reference published lead load data that uses longer 1.169" OAL with start/max charges of 4.0 gr/4.7 gr.
I hope this helps.
Another key factor is OAL, or more specifically, bullet seating depth as Lead RN bullets tend to be loaded shorter like 1.125" OAL compared to 1.130" for 115 gr FMJ/RN for me.
I've always used jacketed data, but stay at least 10% below max, and below the max rated speed for the bullet.Side question: Which data do you guys guys use for plated bullets? Somewhere between LRN and FMJ?
I usually erred towards LRN data, but maybe that is not correct.
Depends on the brand and thickness of the copper plating.Side question: Which data do you guys guys use for plated bullets? Somewhere between LRN and FMJ?
I usually erred towards LRN data, but maybe that is not correct.
Hint; this is why I always find a load in my manuals before I buy any components. Saves a lot of time and frustration. A bunch of years ago I wanted to try a specific bullet in one of my 44 Magnums, bought the bullets but found no data for the powder I wanted to try. Those 300 gr (?) bullets sat around my shop for quite a while and were eventually melted and cast into 150 gr DEWCs for my 38s...My current inability to find any 9mm 115 gr LRN for WSF data led me to ask the question.
If you have a source for this data please share it with me. I really need it.
In situations like this, I usually reduce FMJ data 10% as a starting point for same weight boolits.
Man that’s a bummer! I wish I had known it!Hint; this is why I always find a load in my manuals before I buy any components. Saves a lot of time and frustration. A bunch of years ago I wanted to try a specific bullet in one of my 44 Magnums, bought the bullets but found no data for the powder I wanted to try. Those 300 gr (?) bullets sat around my shop for quite a while and were eventually melted and cast into 150 gr DEWCs for my 38s...
Exactly.I don't think leading is the issue, excess pressure is.