acekc Posted December 27, 2011 Share Posted December 27, 2011 I recently purchased an EAA Witness Elite Limited in .40 and have been working on a load for it. After lots of research on the forum N320 seems to be the overwhelming favorite for major .40 loads so I purchased some along with some MG 180gr bullets and started load development. While it seems a lot of people with S_I guns load very long with their N320 loads, there are also a contingent of people who load at or near max SAAMI length (1.130-1.135") because they're using Glocks. Initially I went down the path of shorter OAL because I liked the idea of something I could at least shoot in my other .40 guns (not concerned about making major in anything but the Witness). I was also under the impression that the Witness mags liked a shorter OAL. One thing I noticed is that the Witness needs more powder to get to major than a lot of the Glock loads I've seen posted, presumably because of a 4.75" barrel vs. the G35's 5.32" barrel. I've settled on 4.9 grains of N320 at 1.3" OAL and with normal seating depth variances on my progressive I get an average PF of 168 over 20 rounds. At this point the primers (CCI SP) look slightly more flattened than lower power loads, but nothing I would consider scary-looking. I'm using a U-die and setback doesn't seem to be an issue (I cycled the same dummy round through the gun ten times and the bullet had moved around 0.003" when I was done). After getting some 21 rounds mags from Henning's shop for Christmas and watching the videos on his site, he references a 1.175" OAL for the magazines. I just saw the video last night so I haven't checked to make sure that 1.175" will clear the lands, but even if I have to go a little shorter this gives me a bigger playground than I thought I had before. Based on my data working up the load above, it seems likely that if I increase the OAL significantly I would also have to increase the charge further, and of course a longer OAL means that I wouldn't be shooting this load in my G23 with Storm Lake barrel or my Sig P229. My question is whether it would be advantageous to blow the OAL out to the max even if it means further increasing the charge, or whether I should just stick with what I have. Criteria would include pressure/safety of course as well as whether the short/less charge or long/more charge load would give me more of the "push" recoil that people look for in their 180gr major .40 loads. Clearly nothing is stopping me from loading a bunch of longer rounds and experimenting further, but I'm hoping to hear from someone who's already done similar experiments to help me determine whether it's a worthwhile exercise. Between work and difficulty getting to the range for chrono testing I've already spent several weeks getting to this point and I'd just like to know if the longer OAL path will get me anything. Quote Link to comment Share on other sites More sharing options...
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