A lot easier if I send it to VA or hand deliver it, strip the stock and re- finish. Anyhow this is the best I can get about the finish.
"Deft Danish Oil Finish-Clear. If you have purchased a stock set or had one finished by DGR this is the oil you need to maintain the finish. Excellent for wood and easy to use. ( One Quart )"
OK, that explains it. I surely don't mean to start an argument, so I hope I can make this clear. Deft Danish Oil is a far, FAR better finish than Linseed Oil or BLO when the stock and handguards stay in the same climate area year around. IOW, it is not a bad finish at all. I do believe Tung Oil is a better finish and Birchwood Casey's Tru Oil is better still, though. The problem with these last two finishes are they take longer to apply and are not as cost effective as Danish Oil. I would also like to use this as a teaching moment as this is a great example to use.
You travel from Texas to Ohio to shoot the John Garand Match. That means you are moving from one climate zone to another and usually there is no time for the wood stock to "normalize" in the different climate before you shoot. You are also trying to get the ultimate accuracy out of a plain wood stock and are more demanding about the accuracy than most people are with wood stocks.
When we built wood stocked NM M14's we had an even larger problem to deal with. We built and rebuilt them every year at Quantico,, VA, then sent rifles to Okinawa, Hawaii, California and Camp Lejeune for Division Matches. Believe it or not, even sending them down just one state to Lejueune meant some differences in stock fit due to swelling or shinking. We did not have the facilities to use a spray on epoxy finish at Quantico and we really didn't have the manpower or time as well. We tried many stock finishes over the years and to this day, Tru Oil is still a superior choice to keep wood stocks from swelling or shinking and is a pretty tough finish that can be repaired fairly simply. Because it does not allow much moisture to get in or out of the stock, there is less problems with normalizing when you move around the country with your rifle.
OK, so how to fix your stock? I am not sure if it is necessary to completely strip the stock to add Tru Oil finish to your stock. What I would try is dampening a wad of paper towels in Acetone and going over the stock to the point most of the surface Danish Oil is gone. That INCLUDES the bedding surfaces, BTW. Then I would allow it to dry for about three days before adding coats of Tru Oil. This should be enough time to ensure the oil in the stock is dry or dry enough. Then abrade the stock by rubbing it down with a GREEN colored abrasive pad. Use compressed air or REALLY wipe the stock down well to ensure there is no residue left. Then hard rub a LIGHT coat of Tru Oil in the stock. You want it somewhat sticky before you move on to another area of the stock. Set that aside for another two or three days to ensure it is dry. Then abrade that surface and following surfaces with a GRAY abrasive pad after it dries and ensure you blow or clean off the residue. Then another light coat of Tru Oil well rubbed in. Try to even the coats throughout the stock each time you lay on a coat. I would use about 8 to 10 thin coats before you rub it out with a WHITE abrasive pad as the final rub out. Then rub the dickens out of it with a terrycloth towel and you will be done. I'm pretty sure the Tru Oil will stand up to the sweat of your hands as long as you wipe it off the stock when you can.