Differences between Manual #5 and #6

[TRIC]

OK guys, some time ago I started a thread about the possibility of a short barrelled 416 Rem Mag. I feedback was real helpful. But, not being one to follow the crowd, I went with the 416 Rigby instead. So, here's my problem: The #5 manual lists RL 22, 100 gr. as the starting load with a 96% load density. The #6 manual lists RL 22, 100 gr. as the starting load with a 104% load density, a compressed load! What gives? Has Alliant changed their RL 22 that much? Was the load info in #5 that wrong? Is the load info in #6 wrong? Is the 400 gr. PT longer than it was before? I want to shoot my new boomer soon! A little help please... :?:

 

[Antelope_Sniper]

Did they change the brass? On a .270 Win size case it's possible to have a 4-5% difference by changing brass.

 

[JD338]

My guess is that its a different lot of brass.

JD338

 

[steve4102]

Nosler changed the way they determine load density. Here is a quote from JustMo.

""Book 6 load density was measured differently to give us a more accurate number. Instead of measuring the weight ratio by volume of powder, it was measured using the weight ratio by volume of water giving us a more accurate reading.""

To be perfectly honest, Nosler's new fangled way to determine load density is all wet. They list several powders as 100-105% LD and in the real world these 105% loads don't even come up to the bottom of the shoulder. To much math and programing and not enough real testing.

 

[JD338]

Nosler changed the way they determine load density. Here is a quote from JustMo.

""Book 6 load density was measured differently to give us a more accurate number. Instead of measuring the weight ratio by volume of powder, it was measured using the weight ratio by volume of water giving us a more accurate reading.""

To be perfectly honest, Nosler's new fangled way to determine load density is all wet. They list several powders as 100-105% LD and in the real world these 105% loads don't even come up to the bottom of the shoulder. To much math and programing and not enough real testing.

Very interesting.

JD338

 

[TRIC]

steve4102, thanks for the info. Now the confusion-facto-meter has really pegged...