.45/70

[Crazy.kayaker]

I'm looking at some large caliber long guns as you can probably tell. What I'm looking at is the twist rate. The rifle I'm looking at has a twist rate of 1:20" r.h. 26" barrel some others rifles I'm looking at are
44 Rem. Magnum / 44 S&W Special 1:38" r.h.
45 Colt - 1:16" r.h.
357 Mag. / 38 Spl. - 1:16" r.h.
44 Mag. / 44 Spl. - 1:38" r.h.
all with a 20" barrel

Is the Twist rates in the list above good for the size of the bullet.
I know that its One Twist for every # of inches. What I don't know is how many twist does one want in a gun depending on your cal.
If someone can educate me on the finer points of twist rates it would be very nice and much appreciated.

 

[Crazy.kayaker]

Is there not anyone that can help me learn what a good Twist rate is?

 

[ben hunchak]

For the 45/70...most leverguns have a 1-20" twist and that is a good comprimize
for bullets up to 500 grs....some of the Black Powder BPCR guns are 1-18 or so, in order for them to use the longer 530-600+ gr. spitzers.

 

[Boomer]

For the most part the rate of twist supplied in factory rifles will stablize a wide range of bullets weights. Usually a custom twist rate is chosen to solve a specific problem, like the standard 1:10 twist for the .243 will not stablize a long 115 gr bullet so the shooter buys a custom barrel with a faster 1:7 twist, or the the benchrest shooter wants the ideal twist for his light weight match bullet. Usually the bigger the bore size, the slower the twist, and conversly the smaller the bore size the quicker the twist, because normal weight big bore bullets are not as many calibers in length as normal weight small bore bullets.


http://www.z-hat.com/twistrate.htm

 

[H4831]

My 243 Ruger would accurately shoot various 100 grain bullets, but the 105 grain bullets I had, forget the brand, would not stabilize.
If I were planning on buying another large calibre rifle, the last thing I would worry about would be the rate of twist. The manufacturers are very good at figuring out what the twist should be.

 

[Johnn Peterson]

My 243 Ruger would accurately shoot various 100 grain bullets, but the 105 grain bullets I had, forget the brand, would not stabilize.
If I were planning on buying another large calibre rifle, the last thing I would worry about would be the rate of twist. The manufacturers are very good at figuring out what the twist should be.

I believe that Speer made them Bruce and they seemed to work well in my model 88 Winchester.