Last week I chrono tested some Underwood 125gr Gold Dot ammo rated at 1475fps out of my G33 with a 4” KKM barrel. I only got an average of 1405fps in 10 rounds tested. There are dozens of chrono test results online, some even right on the Underwood site in the reviews, stating 1500+ velocities out of a 4” barrel. I have not seen any test results yet under 1500fps.
My chrono is accurate. It’s been tested against other chronos. I tested my handload 357sig rounds that were under max load at the same time and they ran just over 1500. It seems I received a bad batch from Underwood?
I contacted them and they responded a few days later that they test with a 4.6” barrel. For one, like I said before, everyone else is getting 1500 in a 4” barrel. And secondly, I found a post from 2018 where a person also contacted Underwood about the 357sig and asked what test barrel they use. Underwood responded that they use a 4” barrel. So I don’t know what to believe. Is it a bad batch? Did Underwood recently lower their recipe? Are they really using a 4.6” barrel now and therefore lowered their load?
I've always been very happy with Underwood ammo, carried it for years, and their 9mm loads have always been right on with my chrono. Has anyone recently tested the 357sig load from Underwood? Curious if you are getting the same results
Well I shot some of it at the range recently, indoors, out of an alpha wolf 4" fluted 357 Sig Barrel and it 'felt' like the advertised velocity, and 'felt' like FPE was 600, or greater. My statements are as accurate as the dodos on YouTube who don't have a trigger pull gauge and emphatically state what the trigger pull is on various firearms! [emoji6][emoji1]
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