The 8mm Mauser loads were a wash. No more paper patched jacketed experiments for me
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The Rem 760 loads in 35 Rem with 205 grain lead RNFP checked bullets were a mixed bag. All loads were with CCI250 (LRMag) except I duplicated the 24 grain load with CCI200 (LR) primers for comparison. OAL2.40. Case fills were from 50% (20.0 grains) to 70% (24.0 grains) in once fired neck sized Remington brass trimmed to 1.908. The bullet was seated with the gas check even with the top of the shoulder and a light crimp applied. Four rounds for each load. Powder trickled up to just tip over the electronic scale to the correct charge.
GRNS MIN MAX SPREAD AVG SD QL FPS QL PSI
20 1,511 1,577 66 1,538 32 1,591 17,765
21 1,485 1,654 169 1,578 79 1,657 19,516
22 1,744 1,777 33 1,762 17 1,722 21,423
23 1,724 1,845 121 1,801 55 1,787 23,492
24 1,846 1,940 94 1,893 39 1,851 25,735
*24 1,841 1,917 76 1,880 41 1,851 25,735
* CCI200
Sorry for the squished table.
- Except for the 22 grain charge the powder gave poor consistency with respect to velocity. This may be related to the low fill volumes and the varying powder position in the case.
- Accuracy was between 2 and 4.5 inches max spread at 50 yards with the best load 24.0 with the CCI200 primers. Some of this inaccuracy I am sure is related to using a rifle rest with the pump action 760. There is too much movement in the sliding forestock to get a solid rest and supporting the forestock with my hand was an awkward reach. I kept using the rest as I didn't want to change part way through the experiment.
- QuickLoad did a pretty good job predicting velocity and I am confident all pressures were pretty close to those predicted. The 35 Remington has a CIP MAP of 39,885 PSI so it should be okay to go up to as high as 27.0 grains for a 80% fill. QL predicts 33,618 PSI for that charge. I am going to load some up to this level and see what happens.
My testing of pistol bullets will be reported in the thread on that subject.
https://lee-loader.com/viewtopic.php?f= ... 2&start=10