X-Treme Bullets question

I have been shooting Zero 185 LSWC over 4.1 BE for years.  OUr club did a bulk order back in Sept, and they are maybe just starting on the .45 ACP bullets. I'm out.  I ordered 2000 X-Treme Copper coated 200 gr SWCs.
Question is, do you think the same 4.1 BE would work for these?  I've read for jacketed bullets you need to load a little hotter so they obturate properly.  Thoughts?
Thanks,Kurt

Extreme's copper coated bullets can be loaded the same as lead bullets unless you order the "heavy plated" versions.  Those start with "HP" in their designator.  Ex: HPRN.

I’ve shot 200 Plated SWC with 4.2 BE and they cycled fine….accuracy, however, wasn’t near as good.  So fine for practice and training, less so for matches.

Wobbley, how so? What did you notice? And was this off a rest or in your shooting?

From my shooting.  Uncalled 8s when firing slowfire on the 25 yard target.  Not many, maybe two out of 20,  but they were there.  Other than that they’re fine for training.

kjanracing wrote:I have been shooting Zero 185 LSWC over 4.1 BE for years.  OUr club did a bulk order back in Sept, and they are maybe just starting on the .45 ACP bullets. I'm out.  I ordered 2000 X-Treme Copper coated 200 gr SWCs.
Question is, do you think the same 4.1 BE would work for these?  I've read for jacketed bullets you need to load a little hotter so they obturate properly.  Thoughts?
Thanks,Kurt

Back in 2018 I conducted my own test of Bullseye and AA#5 with Xtreme plated bullets


M1911 Les Baer Wadcutter
 
 
200 LSWC (H&G 68 type) 4.0 grs Bullseye Lot 907 6/20/05 WLP, mixed cases
13-Sep-18 T = 75 °F OAL 1.250" Taper Crimp 0.469"
      
     
Ave Vel = 715.6     
Std Dev = 10.86     
ES = 37.6     
High =  735.4    
Low = 697.8    
N = 15    
     
     
 
 
200 LSWC Xtreme Plated SWC  6.5 grs AA#5 Lot DM WLP, mixed cases
13-Sep-18 T = 75 °F OAL 1.250" Taper Crimp 0.469"
      
     
Ave Vel = 695.7     
Std Dev = 23.15     
ES = 95.4     
High =  733.4    
Low = 638    
N = 20    
     
accurate at 25 yards.     
     
        
 
     
200 Xtreme plated SWC 7.0 grs AA#5 lot DM WLP brass mixed cases
23-Mar-16 T = 72 °F OAL 1.250" Taper Crimp 0.469"
      
     
Ave Vel = 784.2     
Std Dev = 27.23      
ES = 110      
High =  840.8     
Low = 730.8     
N = 16     
     
accurate, strong ejection.    
     
200 Xtreme Plated SWC 3.7 grs Bullseye Lot 907 6-20-2005 WLP Brass mixed cases
23-Mar-16 T = 72 °F OAL 1.250" Taper Crimp 0.469"
oiled cases      
     
Ave Vel = 651.7     
Std Dev = 11.66      
ES = 40.03      
High =  676.9     
Low = 636.9     
N = 14     
     
all ejected, slide failed to lock back once   
     
     
     
200 Xtreme Plated SWC 4.0 grs Bullseye Lot 907 6-20-2005 WLP Brass mixed cases
23-Mar-16 T = 72 °F OAL 1.250" Taper Crimp 0.469"
oiled cases      
     
Ave Vel = 686.8     
Std Dev = 26.32      
ES = 91.37      
High =  730.4     
Low = 639.1     
N = 14     
     
accurate, functioned and slide locked back  



As can be seen, for the same charge of Bullseye, the plated bullet is much slower.  Now, this lot of Bullseye is slower than my previous keg, a 200 LSWC with 4.0 grs Bullseye went 740 fps. While I did go to matches with a 4.0 grs BE with the 200 gr Xtreme plated, it was not long before I had stove pipes, etc. So I bumped it up to 4.1 grains, and finally 4.2 grs Bullseye. I have not chronographed these loads. And, I bumped up the 200 LSWC to 4.1 grs of Bullseye as I was having issues with this slower lot of Bullseye.