I think that you could cautiously push the loads I gave for 748 and do just as well with it as 2208 in your short barrel. Just be damned careful.
You cant expect to have a short 16" barrel and then chase speed with a 139 grn barrel.
The best alternative to just sticking to what you have got is to get a box of 120 grn Nosler ballistic tips and a pot of cfe.223 powder. Then you will be back up close to full 22" inch performance (2.9k).
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