just bought a set of Hornady 40 S&W dies, so that’ll earn me some XTPs that I’ll likely order in a few days
I would suggest you get 180 gr XTPs as 40S&W and 180 gr bullets go like bread and butter. With long bullet base that produce great neck tension, you can produce light target loads that are still very accurate.
I've read that 180gn bullets may not be the best for 40, since it limits case capacity, and any bullet setback will cause more of a problem with over-pressure.
40S&W was my USPSA match caliber and I used Montana Gold 180/165/155 gr jacketed bullets for matches and Berry's plated bullets for practice.
180 gr bullet is THE bullet that defines 40S&W for me. With long bullet base/bearing surface, 180 gr produces greater neck tension than lighter bullets with shorter base/bearing surface. With proper sizing of brass and OAL for the barrel, neck tension/bullet setback is not an issue even with 165/155 bullets.
I initially used 180 gr to comfortably make major PF and 155 gr for minor PF. 165 gr is a compromise between two weights as it can make major PF pushed to near max load data.
Longer is better for 40S&W to feed reliably and reduce bullet bump on feed ramp (which will cause bullet setback), even longer than SAAMI max of 1.135" and I use 1.142" for TCFP and even longer 1.155" for RMR RNFP for my Glock/M&P/Lone Wolf barrels. I found using longer OAL will improve accuracy, especially with plated bullets with rounded base that leaks a lot of gas. Many match shooters use even longer 1.180"-1.200" for their match barrels -
https://forums.brianenos.com/topic/256596-oal-on-40sw-sti/
powders - Silhouette, HP-38, CFE-P, WST, VV N-320 and 3N37. Got a favorite powder?
Unique/BE-86 to AutoComp/CFE Pistol range burn rate powders work well for 40S&W. My favorite is BE-86, but since you have CFE Pistol/Silhouette/3N37, try them first. I used CFE Pistol with good results.
FYI, BE-86 produced very good accuracy for me -
https://www.thehighroad.org/index.p...ick-plated-bullets.761471/page-4#post-9645513
Another powder I like for 40S&W is Herco. While many complain Herco burns dirty, it burned very clean for me in 40S&W and even left the inside of brass clean -
https://www.thehighroad.org/index.php?threads/40s-w-and-herco-for-lead-plated-bullets.743416/
For target loads, faster burning than W231/HP-38/Sport Pistol will work well. Since you have W231/N320/WST, you can use those powders for light recoiling target loads.
180 gr bullet and 4.0-4.3 gr W231/HP-38 will produce lighter than 9mm target loads and 4.4-4.5 gr will produce mild 9mm like target loads.
If you are interested in light 40S&W loads, Guns & Ammo did a great article on 40S&W USPSA minor PF loads loaded to 125-135 PF using various powders including W231 -
http://www.handgunsmag.com/editorial/ammunition_40lite_091806/138689
started loading 155gr ... still need to do some more testing though. Berry's list a COL of 1.125" for the 155gr FP, which is probably a good COL to try. I load most of my .40 using a COL of 1.125".
Try testing longer OAL for greater accuracy and more reliable feeding.
While SAAMI max length for 40S&W is 1.135", many load longer that will work with their barrels and magazines -
https://forums.brianenos.com/topic/256596-oal-on-40sw-sti/
With typical 180 gr plated and lead TCFP nose profile bullets, longer 1.142" produced greater accuracy for me as illustrated by below groups -
https://www.thehighroad.org/index.p...-for-lead-plated-bullets.743416/#post-9363753
With RMR Hardcore Match RNFP (Thick Plated like Speer TMJ), I used even longer 1.155" OAL to produce this verified group -
https://www.thehighroad.org/index.php?threads/best-group.842106/page-2#post-10938404