208 A-Max Jump

[gimpy]

Just picked up my 300 Win Mag barreled action today and was checking the throat. I get a OAL of 3.590 using a 208 to reach the lands. The AI mag will allow for ~3.68 OAL. Question is, should I seat the A-Max to the lands, or leave ~.01 jump? Not sure if I need to leave a slight jump with a magnum cartridge, or if it will do better with the secant tangent ogive touching the lands.

 

[Rob01]

I load all my AMAX bullets, including the 208, to .020" off the lands. They shoot great there for me.

 

[gimpy]

I'll have to make more. The first rounds were loaded at 3.435. I figured that would give me the ability to shorten as needed in this custom chamber. Guess I'll go +.070 and + .135 with the same load weights and see how she does.

The culprit

 

[briang7511]

I jump mine .030 and they fit in the AICS mag. oal is 3.550. Mag measures 3.640

 

[colt933]

I found a jump of .030 to be the most accurate in my 700P. This makes the COAL about 3.632". I guess my factory chamber has a REALLY LONG throat.

 

[Ol Rob]

I have found all amax's very jump tolerant.except .224 cal 75's.