Ron Long .40-65 Chambers

[Dragoon 45]

Is the Ron Long .40-65 chambers just a slightly lengthened chamber to accomodate resized .45-70 brass?

I saw a Rolling Block so chambered and was trying to figure out the difference between the standard chambering and the Ron Long.

Thank You.

[Arnie]

When Ron designed that chamber you could buy 45/70 brass that was actually 2.1 plus long and when you formed 40/65 brass from it , it would lenghthen to way over 2.1 .Rather than trim the cases he made the chamber longer . Now you cant buy 45/70 cases that long .In my case i use a machine to stretch the 45/70 cases when new and then form them to 40/65 and trim to 2.163. Arnie

[Dragoon 45]

Thank You for the info.

Another question, how much increase is there in case capacity? In my standard chambered .40-65 Highwall and Starline brass, I can get 60 grains of GOEX Cartridge into fire formed brass. Using the Lyman Snover bullet my MV is 1220 fps and if I do things right can get 1 1/2 MOA out of it.

I ask because I might buy that Rolling Block and am trying to figure out what advantages there might be to it.

When Ron designed that chamber you could buy 45/70 brass that was actually 2.1 plus long and when you formed 40/65 brass from it , it would lenghthen to way over 2.1 .Rather than trim the cases he made the chamber longer . Now you cant buy 45/70 cases that long .In my case i use a machine to stretch the 45/70 cases when new and then form them to 40/65 and trim to 2.163. Arnie

[kokomokid]

You will get a chamber that needs aprox 2.130-2.140 long brass. No advantage to R Long chamber except he did not want to trim brass. I get good results with 20/1 snover sized .410 and 58grs swiss 1 1/2 in rp brass trim to 2.130 but I have a long tight chamber.

[Dragoon 45]

Thank You

You will get a chamber that needs aprox 2.130-2.140 long brass. No advantage to R Long chamber except he did not want to trim brass. I get good results with 20/1 snover sized .410 and 58grs swiss 1 1/2 in rp brass trim to 2.130 but I have a long tight chamber.