Sailman
02-25-2006, 03:08 AM
A while back there were some questions asked about case life for 303 British and what kind of accuracy can be expected.
Yesterday I was out to the range testing some 303 British loads. I was shooting 20 shot groups. In recording my data, I use the following notations:
20 [ 17 ( 2 3/4 H X 3 1/8 V ) 20 ( 3 1/4 H X 5 3/8 V ) ] 17-G-4
This means that I shot 20 rounds of which 17 were in a cluster 2 3/4 inch
horizontal and 3 1/8 inch vertical, but all 20 rounds were in a cluster 3 1/4 inch horizontal and 5 3/8 inch vertical, of which 17 rounds were in a group ( longest distance between holes in the target ) of 4 inches.
Bullet------------------------ Fat 30
Bullet sized ---------------- .314
Powder --------------------- 2400
Ammount ------------------- 14, 15, 16, and 17 gr.
Case ------------------------- R P
Primer ------------------------ Rem 9 1/2
Distance --------------------- 100 yd.
RESULTS
20 shots, 14 gr. --- 20 [ 3 3/4 H X 4 1/4 V ] 20- G- 4 1/4 inch
20 shots, 15 gr. --- 20 [ 17 ( 2 3/4 H X 3 1/8 V ) 20 ( 3 1/2 H X 5 3/8 V ) ]
17-G-4 20-G-5 7/8
20 Shots, 16 gr.--- 20 [ 4 7/8 H X 4 3/4 V ] 20-G-6 1/8
20 shots, 17 gr. --- 20 [ 19 ( 4 3/4 H X 5 3/8 V ) 20 ( 7 1/8 H X 5 3/8 V ) ]
19-G-5 3/4 20-G-7 3/8
It should be noted that the bullets were not weighed so one can expect a weight range of apx. 3 gr. , and if there were a void in the bullet, the range would be larger. The allow was WW.
With the targets we use for the military Bolt Action Matches, the 9 ring is 4 inches
so if the shooter was doing his job correctly, for the 14gr. or 15 gr. loads, the results would not to bad.
CASE LIFE
The brass is all RP. The brass has never been full length sized only neck sized. It is estimated that the last 10 or so neck sizings was done with a Lee Collet Neck Sizer, and before that the neck sizing was done with a RCBS neck sizing die.
The number of times the cases have been fired are as follows:
20 rounds ----------------- 27 times
20 rounds ----------------- 38 times
20 rounds ----------------- 39 times
20 rounds ----------------- 38 times
I hope this information is of some value to some folks.
Sailman
Yesterday I was out to the range testing some 303 British loads. I was shooting 20 shot groups. In recording my data, I use the following notations:
20 [ 17 ( 2 3/4 H X 3 1/8 V ) 20 ( 3 1/4 H X 5 3/8 V ) ] 17-G-4
This means that I shot 20 rounds of which 17 were in a cluster 2 3/4 inch
horizontal and 3 1/8 inch vertical, but all 20 rounds were in a cluster 3 1/4 inch horizontal and 5 3/8 inch vertical, of which 17 rounds were in a group ( longest distance between holes in the target ) of 4 inches.
Bullet------------------------ Fat 30
Bullet sized ---------------- .314
Powder --------------------- 2400
Ammount ------------------- 14, 15, 16, and 17 gr.
Case ------------------------- R P
Primer ------------------------ Rem 9 1/2
Distance --------------------- 100 yd.
RESULTS
20 shots, 14 gr. --- 20 [ 3 3/4 H X 4 1/4 V ] 20- G- 4 1/4 inch
20 shots, 15 gr. --- 20 [ 17 ( 2 3/4 H X 3 1/8 V ) 20 ( 3 1/2 H X 5 3/8 V ) ]
17-G-4 20-G-5 7/8
20 Shots, 16 gr.--- 20 [ 4 7/8 H X 4 3/4 V ] 20-G-6 1/8
20 shots, 17 gr. --- 20 [ 19 ( 4 3/4 H X 5 3/8 V ) 20 ( 7 1/8 H X 5 3/8 V ) ]
19-G-5 3/4 20-G-7 3/8
It should be noted that the bullets were not weighed so one can expect a weight range of apx. 3 gr. , and if there were a void in the bullet, the range would be larger. The allow was WW.
With the targets we use for the military Bolt Action Matches, the 9 ring is 4 inches
so if the shooter was doing his job correctly, for the 14gr. or 15 gr. loads, the results would not to bad.
CASE LIFE
The brass is all RP. The brass has never been full length sized only neck sized. It is estimated that the last 10 or so neck sizings was done with a Lee Collet Neck Sizer, and before that the neck sizing was done with a RCBS neck sizing die.
The number of times the cases have been fired are as follows:
20 rounds ----------------- 27 times
20 rounds ----------------- 38 times
20 rounds ----------------- 39 times
20 rounds ----------------- 38 times
I hope this information is of some value to some folks.
Sailman