I'm way, way happier with Underwood, not so much with Doubletap. My purchases from both companies have been hunting rifle ammo. Underwood's offerings loaded with Nosler Accubond bullets I've had delivered are in .243 Winchester, .25-06 Remington, 7mm-08 Remington, and .270 Winchester. Every order was promptly shipped, and correct at delivery, ordered directly from the Underwood web site.
Prior to that, I'd placed an order at Doubletap for two 20 round boxes of their. 25-06 Remington ammunition loaded with the 110 grain Nosler Accubond bullet, and two boxes of .243 Winchesterammo loaded with the 90 grain Swift Scirocco. A box was delivered that contained the. 243 ammo, but no .25-06 ammo, and the packing slip said the .25-06 ammo was out of stock and was on backorder. The ammo availability was listed as "2 - 3 days" when I placed my order and still showed that when the .243 ammo arrived. My follow up emails and phone calls (which always just went to voice mail) were ignored for over four months until after I told Doubletap I was going to open a case with my credit card company against them as my prior messages including saying to just refund my money had also been ignored. Suddenly I got a phone call telling me that materials for my order had been ordered by Doubletap and my ammunition would be manufactured and shipped soon after those materials were delivered to Doubletap. This actually stretched out for another 2 months with missed dates supplied by Doubletap until the final message that my order had been shoehorned into their production schedule and I eventually received two simple boxes of .25-06 Remington ammo loaded with the 110 grain Nosler Accubond bullet. No extra rare or Indiana Jones style quest for other companies like Federal, and Accubond, to procedure and manufacture.
Now, if you go to Doubletap's website a huge portion of the rifle ammunition on there simply shows "Out of Stock". That's what the .25-06 ammo I ordered had its status revised to after my order was finally shipped, and it's stayed that way for almost 2 solid years now. I really, really doubt I'll ever order any ammo in any cartridge, rifle or handgun, from Doubletap again. They certainly don't appear to care to actually supply so many of the products they list ever since then.