Need reloading help
- Thread starter sierracharlie338
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sierracharlie338
Well-Known Member
I was only able to find a MAP of 500 for the Roberts +P. Couldn't find an Ackley drawing yet either.
Tripodmvr7
Well-Known Member
48200 CUP according to Quick Load = 55K psi
Tripodmvr7
Well-Known Member
SC338. I can only do as well as the info supplied. With case volume and COL as shot I can make a much better prediction. The calc I have now done might be way off.
Tripodmvr7
Well-Known Member
Tripodmvr7
Well-Known Member
The above calculation shows a pressure of 53K psi. With modern actions a 60K psi limit is usually safe. I prefer a band of 50-55K psi as that ensures good ignition and burn of most propellants. Case should then also be close to 100% fill.
sierracharlie338
Well-Known Member
I appreciate the help guys. I am being kicked out of the house regularly for the house to be shown to potential buyers so my schedule changes at the drop of a hat. It's really starting to **** me off. I will be loading some more tonight and will work on getting y'all some info. All of your help is much appreciated!
sierracharlie338
Well-Known Member
Ok I finally have some info for yall to work off of.
COAL -2.954
CBTO - 2.441 loaded .020 off the lands
Average water capacity 62.54 (from 10 cases)
Reloader 19
110 Accubond
22 inch barrel with 1:7 twist.
49.9 grains provided about 2882 FPS
I hope this helps. Thanks again for all the help!!
sierracharlie338
Well-Known Member
52000 CUP was the only number I have found so far and that was not from an official source.
Tripodmvr7
Well-Known Member
52K CUP = 60K psi
Your loaded COL is not correct - should it not read 2.941?
Using 2.941 the prediction now is 51.6gr for 2987fps. Pressure calcs at 53K psi.
Your loaded COL is not correct - should it not read 2.941?
Using 2.941 the prediction now is 51.6gr for 2987fps. Pressure calcs at 53K psi.
sierracharlie338
Well-Known Member
The case base to ogive is 2.441
The case overall length is 2.954 (base to tip of bullet)
Guess I didn't need to put both measurements haha
Tripodmvr7
Well-Known Member
Base to ogive is a measurement you can relate to and does not give total length from tip to base as QL needs.
With COL of 2.954 as shot the charge ups to 51.7gr and speed is the same.
With COL of 2.954 as shot the charge ups to 51.7gr and speed is the same.
sierracharlie338
Well-Known Member
Awesome I have some rounds loaded up to 51.9 to test. Thanks again for all your help!!
