The 90 grain Sierra shoots great in my 1955 vintage 99F with 1 in 14" twist. The shortest currently made 100 grain bullet is the Speer. Sierra is longer. I have some Remington 100 grain PSPCL bullets which I will also try. If we ever get over this winter and I can get to the range, I will report on how well the Speers, Sierras, and Remingtons shoot. I have a box of the Hornady 100 grain ammo, but haven't tried it yet. I guess it will be used in my Savage Axis with 1 in 10" twist barrel. The Hornady 100 grain bullets are longer than any of the other 100 grain bullets mentioned.
Regarding your barrel's twist rate, Mule Deer has mentioned that twist rates were nominal in those old days. Sometimes the rifling machine might rifle a 1 in 14', or maybe a 1 in 15" twist. Maybe a 1 in 13", too. I checked mine pretty carefully, and it appears to be exactly 1 in 14".
In another post I listed the lengths of the above bullets. If anyone cares I can re-post them.
Last edited by Jerseyboy; 02/11/18. Reason: More info
