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hornady brass
@ 10:27 am (GMT) |
Tony MarascoJust opened up a box of 270 win ..weighed 3 cases, these were 25 grains lighter than the federal brass 4x used and trimmed slightly twice..It leads to a question about case capacity.Is this one of the factors in hornadys superformance increased velocities?I don't use factory stuff much and I guess I will find out soon enough with my handloads.Premium cases are ordinarily heavier ? Feedback? |
Replies
@ 07:52 pm (GMT) |
Nathan FosterRe: hornady brassHi Tony, Hornady case capacities tend to chop and change throughout the calibers so it cannot be said that high case capacity is a major factor in Superformance loadings. The bulk density of their powder is the key. In the past they used (as an example) H4831sc dispensed via a drop tube to help pack it down. The new powder is simply very small in kernal size but without the typical fast burning characteristics of small kernal powder which burns very quickly. |
@ 03:35 am (GMT) |
deerndingoRe: hornady brassNathan,So is that to say that they get a denser load (IE. more powder weight) in the case. Is that how they do it? |
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@ 06:25 pm (GMT) |
Nathan FosterRe: hornady brassYou got it Tony. Using the .308 as an example, Where we would normally be only able to cram in say 46-48gr H4831sc and achieve relatively poor velocities but extremely mild pressures, due to the high bulk density of SF powder, Hornady can easily utilize charges in the mid 50gr range.SF powder obviously has its limits though based on its burn rate. For example, the 7mm Rem Mag achieves similar velocities with either SF or H4831sc. In this instance, Hornady are simply loading to reasonable pressures resulting in very useful and effective loads. |
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