md66948 Posted July 11, 2012 Share Posted July 11, 2012 I have 500 9mm 147gr FMJ bullets from Roger's Better Bullets. I picked up a 1 LB bottle of Vihtavuori N320 powder and 1K of CCI 500 SP primers. I am planning to drop 3.6 to 3.7 grains of N320 into mixed once fired cases. My COAL will be 1.13. I am looking to create a subsonic round to be fired in several full auto HK MP5s and several HK pistols using a Trident 9 suppressor. Does anyone have any similar experiences with a subsonic load like this one? Your suggestions and/or advice will Greatly be appreciated. Have a Great Day! Dane Link to comment Share on other sites More sharing options...
chuck s Posted July 11, 2012 Share Posted July 11, 2012 I would start with 3.4-3.5 gr Link to comment Share on other sites More sharing options...
md66948 Posted July 11, 2012 Author Share Posted July 11, 2012 I would start with 3.4-3.5 gr Chuck, Thank You! Dane Link to comment Share on other sites More sharing options...
SevoTT Posted July 12, 2012 Share Posted July 12, 2012 I second the 3.4-3.5. My favorite load with MG and Berrys 147s. Link to comment Share on other sites More sharing options...
md66948 Posted July 12, 2012 Author Share Posted July 12, 2012 I second the 3.4-3.5. My favorite load with MG and Berrys 147s. Sevo, Thank You! Dane Link to comment Share on other sites More sharing options...
chuck s Posted July 13, 2012 Share Posted July 13, 2012 a supressor will definitly change the ballistics of my load, however, it is a very safe place to start and shoots very well in my M&P 5". It runs around 870fps Link to comment Share on other sites More sharing options...
Trident Posted July 13, 2012 Share Posted July 13, 2012 Here are my numbers for the HK. It liked the 124g best. 3.6g N320 under MG 147 CMJ 872 Av, ES 60, SD 16, 128 PF Link to comment Share on other sites More sharing options...
Baer45 Posted July 14, 2012 Share Posted July 14, 2012 VV n 3404.2Berrys or any 147 gr. bullet This,is,my go to load in my MP-5 and purrs! Works great with a can. Load can be bumped,up based on OAL..... Link to comment Share on other sites More sharing options...
md66948 Posted July 14, 2012 Author Share Posted July 14, 2012 VV n 3404.2Berrys or any 147 gr. bullet This,is,my go to load in my MP-5 and purrs! Works great with a can. Load can be bumped,up based on OAL..... Baer45, How does your MP-5 handle 147 grainers? We have only shot 115s out of two of our MP-5s, we are going to the 147s to use with the Trident 9. Dane Link to comment Share on other sites More sharing options...
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