P Flados
Member
When I put the 170 gr Speer FN 2041 in Quickload (QL) with a 2.520" COAL, it shows 100% fill and 43,332 psi at 31.8 gr. This is with a 1.140" bullet length and a 0.659" seating depth. QL is showing case capacity as 44 gr H2O. I measured a random once fired 30-30 at 44.5 gr H2O.
QL says that the Sierra bullet is only 0.996" long and the Hodgdon 1.520" COAL gives a 0.515" seating depth. The Hodgdon load data does not show compressed for the 170 Sierra bullet with 36 gr BL-C2, but QL shows 104.3% fill and 55,616 psi and a higher velocity than what Hodgdon got.
The Speer data for the 170 gr Speer FN 2041 shows a 2.550" COAL. The Speer data for H335, Win 748, Win 760 (very similar powders to BL-C2) are also not matching the QL predictions at all when I use the default case capacity. I get much closer to their results if I set case capacity to 50 gr H20.
With the Speer seated at 2.550", QL says seating depth is 0.629" and 32.3 gr gives 100% fill.
My gut tells me that the data is getting messy for case capacity, seating depth and percent fill. Percent fill is a big deal when approaching max loads.
For a quick check to see if QL is close for case capacity and powder density, 100% fill takes 44.3 gr of BL-C2 when I set the bullet for 0.0" seating depth (case full of powder to case mouth),
The above is worse in that the 30-30 is one of those cartridges that is not assured of showing any "signs of pressure" at all as you exceed the SAAMI limit.
I know that many common lever guns were chambered in both 30-30 (42,000 psi limit) and 375 Win (55,000 psi limit), but I have no knowledge if your 30-30 gun was made of the same design, steels and processes of a 375 Win version. Note that the new 360 Buckhammer is rated for 50,000 psi.
The first thing I would do is figure out how much powder it takes to get 100% fill (case full to base of seated bullet). QL says you should be very close to the SAAMI pressure limit with a charge at close to 98% of this value.
QL says that the Sierra bullet is only 0.996" long and the Hodgdon 1.520" COAL gives a 0.515" seating depth. The Hodgdon load data does not show compressed for the 170 Sierra bullet with 36 gr BL-C2, but QL shows 104.3% fill and 55,616 psi and a higher velocity than what Hodgdon got.
The Speer data for the 170 gr Speer FN 2041 shows a 2.550" COAL. The Speer data for H335, Win 748, Win 760 (very similar powders to BL-C2) are also not matching the QL predictions at all when I use the default case capacity. I get much closer to their results if I set case capacity to 50 gr H20.
With the Speer seated at 2.550", QL says seating depth is 0.629" and 32.3 gr gives 100% fill.
My gut tells me that the data is getting messy for case capacity, seating depth and percent fill. Percent fill is a big deal when approaching max loads.
For a quick check to see if QL is close for case capacity and powder density, 100% fill takes 44.3 gr of BL-C2 when I set the bullet for 0.0" seating depth (case full of powder to case mouth),
The above is worse in that the 30-30 is one of those cartridges that is not assured of showing any "signs of pressure" at all as you exceed the SAAMI limit.
I know that many common lever guns were chambered in both 30-30 (42,000 psi limit) and 375 Win (55,000 psi limit), but I have no knowledge if your 30-30 gun was made of the same design, steels and processes of a 375 Win version. Note that the new 360 Buckhammer is rated for 50,000 psi.
The first thing I would do is figure out how much powder it takes to get 100% fill (case full to base of seated bullet). QL says you should be very close to the SAAMI pressure limit with a charge at close to 98% of this value.
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