JeffinNZ
07-19-2008, 08:58 PM
Team.
For those that have followed my posts you will know I am a great supporter of Jim at CBE and his Australian brass moulds. This is because:
1) He's almost local to me in New Zealand.
2) As his moulds are not mass produced their qualitiy is exceptional.
3) Jim is innovative in his designs especially for calibres most popular at our end of the world eg: .303 Brit, .310 Matini etc.
Jim has sent me his latest .303 mould for testing.
O/A length 1.250"
Nose to 1st groove (crimp?) .830"
Nominal Diameter nose .303"
Nominal Diameter driving bands .316"
GC shank .287"
240gr in WW.
Yesterday I set to casting and knocked out a couple of hundred in addition to some other designs (I can't stand running just one mould). Here is the bullet with a .22RF for comparison.
http://img.photobucket.com/albums/v505/JeffinNZ/Shooting%20stuff/IMG_0110.jpg
Jim has cut 'micro grooves on the bore riding nose to carry some hand applied lube. Great idea. Cast in clip on WW with approx 2% babbit mine measure .3035 on the nose, .316 on the first two driving bands and .317 on the rear band. 237gr on average.
For testing I chose my No4 MkII .303 and my .303 Pygmy as they are both proven accurate and wear Parker Hale 5 sights. Here are bullets and dummy rounds.
http://img.photobucket.com/albums/v505/JeffinNZ/Shooting%20stuff/IMG_0107.jpg
Today I tested both at 50m. The Pygmy was loaded with 21, 22, 23gr W748 and prodoced 1300-1480fps and groups of approx 1 inch. The 23gr group was getting tighter so I will test again with 23 and 24gr. Bullets ran into a .3165 sizing die to seat the gas check and lube. Not bad results.
The No4 MkII was loaded with 24, 26 and 28gr of Benchmark (BM2 down here). With the bullets were sized .314 I shot the 24gr first and the 3 rounds generated 1500fps and ONE hole at 50m!!!!!! 26 and 28gr grew to 3/4 and 1 1/4 respective and 1600 and 1740fps.
http://img.photobucket.com/albums/v505/JeffinNZ/Shooting%20stuff/IMG_0111.jpg
I will continue to test but first results show a DEVESTATINGLY accurate bullet. Seated as above in the No4 MkII the bullet engages and has five perfect engraved marks on the nose aiding bore alignment.
This would be a great game bullet and travelling at even a modest 1700fps in the 9.8 BHN alloy I cast it would upset very nicely at ranges out to 100m I am sure.
More soon.
For those that have followed my posts you will know I am a great supporter of Jim at CBE and his Australian brass moulds. This is because:
1) He's almost local to me in New Zealand.
2) As his moulds are not mass produced their qualitiy is exceptional.
3) Jim is innovative in his designs especially for calibres most popular at our end of the world eg: .303 Brit, .310 Matini etc.
Jim has sent me his latest .303 mould for testing.
O/A length 1.250"
Nose to 1st groove (crimp?) .830"
Nominal Diameter nose .303"
Nominal Diameter driving bands .316"
GC shank .287"
240gr in WW.
Yesterday I set to casting and knocked out a couple of hundred in addition to some other designs (I can't stand running just one mould). Here is the bullet with a .22RF for comparison.
http://img.photobucket.com/albums/v505/JeffinNZ/Shooting%20stuff/IMG_0110.jpg
Jim has cut 'micro grooves on the bore riding nose to carry some hand applied lube. Great idea. Cast in clip on WW with approx 2% babbit mine measure .3035 on the nose, .316 on the first two driving bands and .317 on the rear band. 237gr on average.
For testing I chose my No4 MkII .303 and my .303 Pygmy as they are both proven accurate and wear Parker Hale 5 sights. Here are bullets and dummy rounds.
http://img.photobucket.com/albums/v505/JeffinNZ/Shooting%20stuff/IMG_0107.jpg
Today I tested both at 50m. The Pygmy was loaded with 21, 22, 23gr W748 and prodoced 1300-1480fps and groups of approx 1 inch. The 23gr group was getting tighter so I will test again with 23 and 24gr. Bullets ran into a .3165 sizing die to seat the gas check and lube. Not bad results.
The No4 MkII was loaded with 24, 26 and 28gr of Benchmark (BM2 down here). With the bullets were sized .314 I shot the 24gr first and the 3 rounds generated 1500fps and ONE hole at 50m!!!!!! 26 and 28gr grew to 3/4 and 1 1/4 respective and 1600 and 1740fps.
http://img.photobucket.com/albums/v505/JeffinNZ/Shooting%20stuff/IMG_0111.jpg
I will continue to test but first results show a DEVESTATINGLY accurate bullet. Seated as above in the No4 MkII the bullet engages and has five perfect engraved marks on the nose aiding bore alignment.
This would be a great game bullet and travelling at even a modest 1700fps in the 9.8 BHN alloy I cast it would upset very nicely at ranges out to 100m I am sure.
More soon.