I just swapped out a marlin 338 express for a Browning BLR in .243 Belgium 1971 .
I am looking for a good deer round .I know there are both sides not a good deer round ,hell ya it is and ,and more . What bullets will work best for penetration , and what powder that proves good grouping to match up with

Well guess not much interest in the .243

100g Hornady over whatever powder you have appropriate for .243.

Just FYI, I had a BLR in 308 from that era and had to use a small base die set. Tight chambers were common. I have used 243s in other rifles for about 60 years, and I have never lost a deer with them, either muley or whitetail. Slow burning powder and a good bullet like the Nosler Accubond are deadly. Good Luck!

I found a box of hornady interlocs 100 gr and some 85 gr game kings I had left over from a 6 mm rem ,I have a set of dies coming this week and I will pick up a box of nosler's and see what ones fly the best

The BLR is a fine rifle, I have a '81 model in .308 Winchester. There are dozens of good .243 recipes for deer. You might check the reloading/handloading forum for lots of discussion in the archives about .243 deer killers. I have used the .243 for a couple dozen deer with excellent results.

I great performer in every 243 I have loaded for has been the 95 nosler ballistic tip over 41.5 grains of H4350. Very accurate and good velocities. The 95 BR is a tough bullet too, the best going in the 243 IMHO

I was reading some where 4350 is one of the better powders in the .243 And I do have plenty of that thanks for the reply