As the title says, I am trying to figure out a velocity issue I am experiencing. Twenty rounds loaded with 44gr of Varget in FGMM once fired cases.
So here's the deal, I loaded 20 rounds, with one difference:
(a) 10 rounds were loaded using a simple funnel (RCBS cup/funnel) to dump to charges into the case (rounds on the right)
(b) 10 rounds were loaded using a "long neck" funnel (like 4"), to dump the charges into the cases (rounds on the left)
Both groups were seated to 2.21" CBTO. However, Group A what I can only describe as a pressure ring near the top of each round. Group B did not, also there was no "crunch" when I loaded each round. There was a crunch for each round of Group A.
While the group sizes were negligible, group A was running about 25fps faster. Neither group showed pressure signs. Any ideas? Am I concerned about nothing?
So here's the deal, I loaded 20 rounds, with one difference:
(a) 10 rounds were loaded using a simple funnel (RCBS cup/funnel) to dump to charges into the case (rounds on the right)
(b) 10 rounds were loaded using a "long neck" funnel (like 4"), to dump the charges into the cases (rounds on the left)
Both groups were seated to 2.21" CBTO. However, Group A what I can only describe as a pressure ring near the top of each round. Group B did not, also there was no "crunch" when I loaded each round. There was a crunch for each round of Group A.
While the group sizes were negligible, group A was running about 25fps faster. Neither group showed pressure signs. Any ideas? Am I concerned about nothing?