Misfires & Problemswith 45-70 marlin 1895

4594 Views 6 Replies 6 Participants Last post by swifty, Feb 25, 2003

swifty

Discussion Starter · Feb 24, 2003

This afternoon, I shoot about 20 rounds with 5744 30 grains
and had two misfires with federal large rifle primers. I rechambered thede rounds and they fired properly. I did notice some unburned powder in my rifle barrel.
I have using the RCBS priming unit that fits on my Rock Chucker with a primer tube feed.
Now i am beging to question the powder 5744 , partial fill,
priming technique,bullet crimping( used the Lee crimp).
Also, I got some erratic velocities on my Pact chronograph.
The volicities ranged from 1270 feet per second to 680 feet per second.
I have used the same chronograph before with consistant velocities. I shoot several rounds with my 375 H7H mag
whic seemed to be consistant.
I called Accurate powder company on Friday.They assured me that 5744 would perform properly with a partil filled cartridge.
The rounds printed well on a 50 yard target.Its just that I got some misfires, unburned powder, and eratic velocities.
Comments or answers will be appreciated.

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Alk8944

· #2 · Feb 24, 2003

swifty,

The mis-fires and erratic velocities can both be attributed to a light hammer strike, Yes, it does matter how hard the primer is struck, a too light strike can result in poor ignition even if the cartridge fires. I would check firing pin protrusion, and also make sure that there is no unburned powder or other obstruction in the bolt.

Don't worry about the 5744, it is one of the best choices for lead bullet loads in the straight cases.

If it was a cold day, excessive lube in the bolt body cloud have been a problem also.

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