Modern Sporting Rifle Evolution
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Nomadic

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Reply with quote  #1 
Does anyone have data on this? I didn’t see it and the search feature doesn’t work well when I’m on my phone bi know people have said it’s better than Starline, but wondering how it compares to the original LC.

I need a little more room for powder with the 100 MDWS to get the FPS I want
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BIGGDAWG

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Reply with quote  #2 
starline wlv brass ff capacity26.8 
hornady brass fresh capacity26.6 
hornady brass fire form capacity27.4 

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Nomadic

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Reply with quote  #3 
Thanks Biggdawg. Any chance you have the same info for LC?
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BIGGDAWG

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Reply with quote  #4 
my lc is 27.5 or so fire formed
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Nomadic

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Reply with quote  #5 
So Hornady very similar to LC, capacity, but hopefully more consistent and has the .277 WLV headstamp. Sounds like a winner
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Nomadic

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Reply with quote  #6 
My Hornady brass has been shipped. I am going to use it to test the 100 MDWS bullets. Of course I will size, chamfer, and debur flash hole. Any problem with testing loads in unfired brass?
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BIGGDAWG

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Reply with quote  #7 
nope i test on fresh brass all the time.
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Nomadic

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Reply with quote  #8 
Quote:
Originally Posted by BIGGDAWG
nope i test on fresh brass all the time.

Thanks. That’s what I thought, but wanted to hear confirmation.
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Nomadic

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Reply with quote  #9 
Next question: does case capacity affect muzzle velocity? If I’m getting 2660 FPS with 23.6 gr of SWBO in LC brass, should I expect the same velocity in Hornady? Hornady will definitely have more pressure. I know this because I completely blew out primer and scorched case head of unfired Hornady brass at 24.2. I saw no signs of pressure at 24.2 in LC brass
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RangerJoe

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Reply with quote  #10 
Yes - case capacity (e.g., case head & wall thickness) affect MV.  When changing brass, drop back at least 10% and work back up.
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Nomadic

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Reply with quote  #11 
I know pressure will change and started low and worked up. I was hoping to get the 100 MDWS over 2700 fps, which took 24+ grains of SWBO in LC brass. Looks like my max safe load on Hornady brass is 23.6 which was at 2660. Just curious If I should expect same sped or if increased pressure would give a little boost.
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RangerJoe

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Reply with quote  #12 
I'm missing something... sorry.

You said max safe load with Hornady brass is 23.6gr SWBO which yielded 2,660 fps with 100gr MDWS bullet. 
You also said max safe load with LC brass was 24.2gr SWBO which yielded 2,700 fps with same 100gr bullet.

But you're asking if 23.6gr SWBO in Hornady brass will be faster than 23.6gr SWBO in LC brass?  My guess is yes... since it seems Hornady brass has less case capacity than LC brass; but what's the point.  If you can load 24.2gr SWBO in LC brass to obtain 2,700 fps with good accuracy, why load it to 23.6gr?

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Nomadic

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Reply with quote  #13 
Quote:
Originally Posted by RangerJoe
I'm missing something... sorry.

but what's the point.  If you can load 24.2gr SWBO in LC brass to obtain 2,700 fps with good accuracy, why load it to 23.6gr?


That is exactly my point.

I REALLY want to use WLV headstamp brass, but I just can’t seem to get the same performance as the LC.

I guess I will use LC for hunting load and WLV stamp brass for plinking loads.
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bbbrownfield

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Reply with quote  #14 
Accuracy assumed to be the same with both loads, do you really think the animal can tell what hit him is going 40fps faster? I sincerely doubt it. I would load for best accuracy and let the speed be a variable instead of the goal...but that's just me.
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Nomadic

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Reply with quote  #15 
The problem is that I have not found accuracy yet with the 100 MDWS. I think 24.2 in LC and 23.6 in Hornady are my fps nodes. Now I need to play with seating depth and find my accuracy nodes. I have had technical difficulties my last 2 trips to the range. If 23.6 is more accurate I will run it. I just would like to have that extra 40+ fps so there is a little less drop at 250-300 which will be my max shot distance. I’m hunting at night in thermal, so hard to judge distance and drop. The tighter my drop numbers the better. Although the 40 fps only gives a 2” difference at 300 yards
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Cabob

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Reply with quote  #16 
I second what bbbrownfield says. The animal won't know the difference of 40 ish fps. Load for accuracy. I don't know what elevation you're at, but I plugged in the worst case scenario (sea level) into my ballistic app using the supplied bc of .290 from the mdws store, and a 40 fps difference from 2700 to 2660 equates to roughly a whopping .375" elevation difference at 300 yds, not 2". Good luck. Let us know what you find.
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