![]() H110 is not recommended for downloading per manufacturer. ES was crazy high like in the 250fps range. Best I could get was around 1150fps before I was worried about downloading h110 too far. You will not get port pressure up in a subsonic load with h110. I have chrono'd factory Remington subs with the 220smk from a 10" barrel, they all run around 990-1000fps.Įdit: those who prefer h110 for subs are wasting their time. When I did load subs, I used 245grn bullets I cast, these ran flawlessly down to 950fps in the pistol with aa1680. There doesn't seem to be a standard between manufacturers on gas port size. 095 and when I had a 16" it was opened up to. If it's good enough for the cartridge's developer then it's good enough for me.and my testing has proven it to me. In my humble experience, 1680 is the powder for subs period. ![]() ![]() Still developing subsonic loads for Hornady 208 AMAX and SMK 220's. I've also had good success with Berger VLD's with A5744, 11.2gn, 2.20"COL. GI, Magpul, and Lancer AWM mags all function at 100%. 9" and 16" - No FTF's,FTE's, with 100% bolt hold open on last round. I run a standard buffer spring in both the 16" & 9", with a carbine buffer in the 16" and a H2 buffer in the 9". This load cycles perfectly in both my 9" and 16" AAC uppers both unsuppressed and suppressed. After a ton of subsonic testing, my pet load for 300 BLK subs is:īerger VLD 210 (target or hunting bullets, a little pricey at $47-$49/100 but well worth it)ģ00 BLK Rem or PNW Brass (new or fired brass trimmed to 1.358")
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