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Old September 28, 2012, 08:04 PM   #6
Slamfire
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Join Date: May 27, 2007
Posts: 4,133
I have shot thousands upon thousands of 38 Special rounds using 3.5 grains of Bullseye with LSWC, JHP, LRN, LBBFPRN, etc. Point of aim between the bullets type is close enough that I cannot tell a difference between bullets. I truly think that my flinch causes more variation in impact than bullet configuration. Velocities are so similar it would take a statistical analysis, (perhaps Students T test?) to see if there is a velocity difference between a LSWC and a LRN of the same alloy.

I have shot that load in many revolvers, some I still own, some I do not. I have shot that load in 38 Snubbies, four inch barreled 38’s, and 357 Revolvers. It shoots very well. I have also tried a couple other powders, with 125 gr Bullets, all of which are below. And there are a few 148 LWC data in the mix along with factory rounds to give a reality check on my loads. This is real world data, not shot from pressure barrels.

The dumped charges are as similar as I can make them, given a Dillion progressive, there are variations due to which primers I used. Primer use is based on who was making the cheapest primer at the time of loading. Winchester has been the consistently low cost primer maker for a while, most loads are WSP.

I have never found a need to use the same case, so I am using brass that has been fired God Knows how many times and a rainbow of headstamps. All of which shoot fine.

I have shot other powders and other loads, but Bullseye is so constantly accurate and shoots to Point of Aim in the fixed sight revolvers, that I have standardized on that load and powder and see no reason to chase the “Powder de jour” . It also is close to the non +P factory ammunition I have shot in terms of velocity. So I consider this load equivalent to factory ammunition.


The 148 LWC with 2.7 grs Bullseye was a popular Bullseye load back in the day. It is very accurate and has very mild recoil. Shoots well in 38 Special chambers and in 357 chambers.

Code:

4" S&W M10-5 				
					
148 LWC Valiant  2.7grs Bullseye W/W cases WSP 		
19-Apr-09	T ≈  60-65 ° F				
					
Ave Vel =	696.2	 			
Std Dev =	12.04	 			
ES =	48	 			
High  =	721.3	 			
Low  =	673.3	 			
N =	32	 			
	v accurate, about 2" low, no leading, mild recoil	
					
158 LRN Valiant  3.5grs Bullseye Mixed cases WSP 		
19-Apr-09	T ≈  60-65 ° F				
					
Ave Vel =	758	 			
Std Dev =	22.86	 			
ES =	100.9	 			
High  =	810.5	 			
Low  =	709.5	 			
N =	32	 			
					
158 LRN  3.5grs Bullseye Mixed cases WSP 	Gamma Chrony	
5-Aug-06	T = 100 °F				
					
Ave Vel =	796	 			
Std Dev =	13.89	 			 
ES =	55.24	 			 
High  =	813	 			 
Low  =	757.9	 			 
N =	23	 			 
					
				
					
158 LRN  3.5grs Bullseye Mixed cases WSP 		
22-Dec-07	T = 52 °F				
					
Ave Vel =	768.6	 			
Std Dev =	15.58	 			 
ES =	48.52	 			 
High =	787.6	 			 
Low =	739.1	 			 
N =	18	 			 
					
					
					
125 Valiant BBRNFP 4.0 grs Bullseye Mixed cases WSP 	
9-Apr-06	T = 59 °F				
					
Ave Vel =	863.4	 		 
Std Dev =	30				 
ES =	70.78				 
High  =	907.5			 	 
Low  =	836.7			 	 
N =	6				 
Windage centered	accurate				
Elevation at least 4" low	
	
125 Valiant BBRNFP 4.5 grs Bullseye Mixed cases WSP 	
9-Apr-06	T = 64 °F				
					
Ave Vel =	945.6	 		 
Std Dev =	27.28				 
ES =	75.21				 
High  =	995.2			 	 
Low  =	920			 	 
N =	6				 
Windage centered	accurate				
Elevation at least 4" low




Code:
Colt Python  Stainless Steel, 6" Barrel			
					
148 gr LBBWC 2.7 grs Bullseye  38 SPL cases  CCI500  24 Sept 1999  T =  78  F
Ave Vel =	710		 	 	 
Std Dev =	18		 	 	 
ES	72.02		 	 	 
High	746.1		 	 	 
Low	674		 	 	 
N =	33	shot fine at 25 yards, no leading, light recoil
					
158 gr LRN  3.5 grs Bullseye 38 SPL cases CCI500  24-Sep-99  T = 78  F
Ave Vel =                    771		
Std Dev =	12			 	
ES	35.9			 
High	792.6			 
Low	756.7			 
N =	6	
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