Who has a good supply and prices??

If you need high end stuff, check out S&S Precision in Argyle. J.D. carries what is normally only internet order equipment. Otherwise, I just go to Cabellas. If you want best prices, you need to order it, in my opinion. However, if you need something and have questions, J.D. is a no BS kind of guy that will show you how to use it. They are benchrest rifle builders and J.D. was the one who taught me about neck turning several years ago. Ask him about his .300 Jarret It is Bad-A.

Also Bass Pro at least in grapevine carries reloading equipment now and fairly priced. I bought all my dies off ebay. They were all in good shape and paid less than 50% or more of what they are new.

What are some D/FW places that carry Powder?

bass pro, and cabelas for sure.
if ur up around Pilot Point the Ace hardware has a small selection.
Go to alliantpowder.com and imrpowder.com they should have the option to find a dealer, The IMR website is also for Hodgdon and winchester powders.

Elk Castle shooting range has a good selection but Alpine shooting range probably has the best selection in the dfw area for powder.

Cabela's-Graf & son-Natchez Shooter's Supply for
mail order. . .
Southwest Ammo-gun show-BPS for in person

Doc's in Carrollton usually has a good supply of powder and bullets. So does SPS Guns in Carrollton.

I miss Nix Shooting supply, they always had what you needed and at a reasonable price.

Ray's Southwest Ammo in Mesquite has a big selection of primers and powder if your on the east side of DFW. Prices are ok I guess, I shop there cause I like to get my hands on stuff before I buy it.

Elk Castle in West Fort Worth is getting out of the reloading stuff biz, seems like every time I step foot in the place they have less and less components. I go to Cabelas for powder, Fort Worth Gun Shows for primers and do the mail order thing at Grafs, Natchez and Midway for shells, bullets, dies and accessories. If you order stuff thru Cabelas catalog and have them ship it to the store they won't charge you for shipping. They'll also give you a discount if you have a type 01 or 03 (C&R) FFL. Alpine Range in South Fort Worth (Forest Hill) has powder and bullets also. I kinda miss Gibsons, I used to buy most of my reloading stuff there years ago.