chief99 said:
Another rookie question. Loading 40 cal. 165 gr. Berrys copper plated. My Lee and Lyman manuals have OAL as 1.225, the lowest I have seen in the Lyman is 1.085 , that is for jacketed rounds. Some of the factory loads are as low as 1.oo9 and are not consistent. Don't understand. I'm loading 4.7 grs. of bullseye . Keep seeing threads about loading for accuracy.
Hopefully my post answers some of your questions. You may need to start new threads to discuss rest of the questions not answered.
-Gadsden- said:
What is your process for working up a load?
I load for multiple pistols and this is what I use for new pistol bullet/powder work up. Since I shoot at indoor ranges where I cannot set up a chrono, I use the accuracy trends as my guide.
1. Resize and chamber check cases to be used for the work up in the tightest barrel to ensure they all drop in the chamber and fall out freely. This way, when the dummy rounds (no powder/no primer) don't fully chamber, you'll "know" it's not from improper resizing of the case.
2. Determine max OAL. Using the barrel drop test outlined in Walkalong's thread, I use the shortest max OAL from all the barrels I have -
http://www.thehighroad.org/showthread.php?t=506678
3. Determine working OAL. Starting with the max OAL from step #2 or length limited by the magazine (whichever is shorter), I incrementally decrease the length until the dummy rounds reliably feed/chamber from the magazine for all the pistols. (Note: I found the same bullet nose profile like RN from different manufacturers will have different "ogive" that may result in different working OAL. For 40S&W, depending on the barrel, your working OAL may be longer than SAAMI max of 1.135")
4. Identify load data and start/max charges. Using the working OAL from step #3, for the same bullet type (jacketed/plated/lead/Moly/etc.), nose profile (same nose profile or similar to focus on bullet seating depth) and bullet weight (being off by 1 gr like 124 vs 125 is OK as most bullets vary by that much or more), I reference all available published load data from powder/bullet manufacturers and utilize the most conservative start/max charges for the initial range test. For semi-auto pistol loads, if I am using faster than W231/HP-38 powders and/or using shorter than published OAL (or deeper bullet seating depth), I may consider using .2-.3 gr below published start charge as my start charge and to identify light recoil target loads.
5. Conduct powder work up/range test. Load 10-20 rounds of each .2-.3 gr incremental loads and shoot 5 round shot groups at 7-10 yards while monitoring accuracy trends. In my notes, I will identify which powder charges started to reliably cycle the slide/extracted/ejected spent cases. If I have any pressure concerns at a particular powder charge, I will stop my range test.
6. Review range test results and repeat range test. Identify the powder charges that produced the most accurate shot groups and "fine tune" by loading smaller increment (.1-.2 gr) loads and repeat range test to verify accuracy trends. I will subsequently test the most accurate loads at longer distances of 15-25 yards and may test higher powder charges (based on initial range tests/if higher charges were not tested) at later range trips.
7. Custom tailor loads for accuracy. If I want to enhance the accuracy of the load for the particular pistol/barrel than the shortest working OAL I used to work with all the pistols, I will test longer working OAL for that pistol/barrel.
Mostly practice at 21 ft. Sometimes shoot a 2 in. group and sometimes it looks like I'm shooting a shotgun. So I believe that's just my shooting skills and not the bullet. Very frustrating. How do you learn to shoot more accurate.
This will definitely require a new thread discussion and covered in depth in multiple threads in "Handguns: Autoloader" category -
http://www.thehighroad.org/forumdisplay.php?f=33
A quick tip to improve your range test accuracy for new bullet/powder work up is to dry fire while watching the front sight. If the front sight moves/jumps when the hammer/striker is released, practice dry firing until the front sight doesn't move. You may want to search for threads that cover polishing trigger contact surfaces to smooth out/break in your trigger.