Formulas for plated bullets.

I found this earlier with 102 grain cast bullets too.


Results:

Crony'd the WW231 and some others.

3.3 grains WW231, OAL .970" 100 grain HB plated Berrys. AV 762, ES 100

Bumped it up to 3.5 WW 231. AV 802 ES 100. HOrnady shows 3.5 for jacketed bullet.

Tried 5.5 grains Blue dot, looked like not much more would fit in the case. I did find published up to 6.0 in modern books, and 6.5 in an old one.

AV 750 ES Two hundred seventy nine! Yes, 279.

Then went to my stand by, 4.0 Unique. Ahhh yes, AV 864, ES 61.

I have seen in the hercules reloaders guide up to 4.2 and just saw in LEE book 4.3 unique for a 100 grain bullet.

Sticking with 4.0 for these. Its a new P238 which is not even in my possession yet. Loads were tested in my Ruger LCP.

Just for reference I am getting 850 fps from winchester white box and remington round nose. I think 95 grain for both, so I am happy with 862 for a 100 grain which is a few foot pounds more.

David
 
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Western has a ton of data like you are asking for, but does anybody see what I see.....across the range of 124gr 9mm aa#5 data, I see a few tenths of a grain variation on max load, a few hundred psi in pressure at std oal's for hp and run rounds. They all have about the same velocity also...about 1075 fps.


You can follow these loads exactly or work up your own and confirm velocity.

Can I deviate? Yes, I do. How do I know I'm safe? Confirm velocity, case marks and accuracy. Best accuracy at or below 1075 fps is in the same pressure spectrum.
 
Nathan I think if you look a little closer you will see that same pattern across the board with all powders and not just the #5.
 
Nathan I think if you look a little closer you will see that same pattern across the board with all powders and not just the #5.
Click to expand...

That was kind of my point. I think I can safely load to jacketed data under 1200 fps and let accuracy and velocity be my guide.

For the last few years, this has given me good results, but typically below max loads for best groups.
 
Sorry been gone for a few days.

I tend to view it a different way in that to me it shows while one could have 8 examples of bullets that all have the same weight they certainly do not have the same construction. Hench the variations. Everywhere I go the consensus seems to be that a 124gr bullet is the same as all others or whatever weight you have. Just pick one and go.

So what this shows me is that all 124gr bullets are not alike. Plated is not cast and plated is not jacketed. Just as Jacketed is not cast.

I also believe that plated bullet use is on the rise because the are cleaner than cast, economical, becoming widely available and more and more places are restricting cast lead.
 
I use the manuals as a general guide watching for pressure signs including higher velocity than I expect, or expected for the caliber and weight. OAL, charge weight, Velocity are all considered as I decide where to go.

Its all just a guide.

David
 
Powder Manufacturers Publish data for plated

Powder Manufacturers Publish data for plated bullets. Not all, but some very mainstream. For example Hodgdon: 124 GR. BERB HBRN TP; Accurate: 124 (P) BERRY HBFP.

They publish this data and similar data for jacketed and cast so that you can deduce a correlation direction and magnitude by looking at the same bullet weight of different construction.

What I mean by that is: Hodgdon lists .40 SW 155 gr data for Berrys and 155 Hornady XTP (Jacketed). The Berrys load uses 0.4 grains more of the same powder. Therefore, I would use the Berrys data for my 155 gr. Rainier Plated bullets.

http://www.hodgdonreloading.com/data/pistol

155 GR. BERB FP
Starting Loads Maximum Loads
Manufacturer Powder Bullet Diam.
C.O.L.
Grs.
Vel. (ft/s)
Pressure
Grs.
Vel. (ft/s)
Pressure
Hodgdon CFE Pistol .401" 1.135" 7.2 1,162 26,400 PSI 7.8 1,232 31,900 PSI
BULLET WEIGHT
155 GR. HDY XTP
Starting Loads Maximum Loads
Manufacturer Powder Bullet Diam.
C.O.L.
Grs.
Vel. (ft/s)
Pressure
Grs.
Vel. (ft/s)
Pressure
Hodgdon CFE Pistol .400" 1.125" 6.6 1,103 25,800 PSI 7.4 1,219 32,600 PSI
 
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