I to got a used Remington 70050 Cal last spring. I wanted to save my self some grief so did a search on different fourmsfor loads others are useing in their 700's.Here is a list of what I found and saved.
50 Cal
I am shooting 110 grains of T7-2f with a 300 grain bullet getting very good accuracy and 1750 fps.

I shoot 95 Grains of loose 777 ffg powder & the TC 250 Gr. PTX Sabot.

90 gr. of loose Pyrodex and 295 gr. power belts


a Nosler 260 grain partition or for a less exspensive bullet a bonded Speer 250 grain Gold Dot - 110 grains of T7-2f - both of these are deadly on deer out to 150 yards..

300gr. Barnes MZ and the 300gr SST's. I used 120gr. of loose 777


348gr Black Belts. The copper plated ones; not the naked lead. I'm shooting 120gr loads of Swiss FFg and it groups into a 3 inch bull at a hundred yards.

100 grains t7-2f - 260 grain - .451 Nosler partition in a Nosler or MMP HPH-24 black sabot.
Target practice - just switch out the bullets for a compairable Hornady (expense).



260 grain Knight lead sabot over 100 grains Pyrodex RS or over 90 grains 2f 777
250 grain Shockwave/SST over 100 grains 2f 777 (consistent 1.5" or better);
348 grain Powerbelt over 100 grains 2f 777 (this may be the best shooter of all. Haven't shot enough groups to confirm consistency) I use nothing but RWS 1075 #11 caps and see no need to change.
220 or 260 grain Dead Centers in this gun.
It also does nothing great with the 250 grain Barnes copper sabots, 240 grain XTP or 300 grain XTP.

Hornady 300 grain 44/45 cal XTp or XTP mag. I use the 44's because they have a better BC for down range - but either one of them shoots great.

Nosler Sabots - (both 44 or 45) they are an ugly color but work real well and go down the tube just right - no matter how many times I have shot.

100 grains of t7 - loose powder
209 primer set up - but I really didn't have any problems with the #11's

I Shot this group with 80gr. T7 and 240 HP XTP's 50 yards.



I had to swab between shots but was getting great two shot groups with out swabing. I saw no need to try anything else at this point.
I may try some of the ones on the above list at a latter date.
Good luck with it.


Al