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Originally Posted by 41rem
They do look pretty.

Just this morning l shot some of the hardcast Rim Rock 200 grain pills load as follows

200 grain lead
11.3 #9
WLP
Starline brass

Got 1150 fps with my all stock Glock 20. Accuracy was good & recoil quite manageable.


41

I've also been shooting the Rimrock 200 in a couple 10mm's. I was out yesterday as well, working with AA #9 and getting good results...

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Bluedot, Longshot for the fast stuff. 231 for the target loads. #9 never clicked for me, nor did #7.


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41rem Offline OP
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Will Longshot give me lower operating pressures over #9 with equal muzzle velocity with these 200 grain loads?


We deal in lead, friend.
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When I asked MBW about the difference between the coated and non-coated 200gr WFNs they said the coated ones are made with a more brittle alloy and are intended as a practice bullet, not a game bullet. They shoot the same in my guns, so it's a win.

In my G29, 8.2 grains of Longshot is very accurate and gets 1150 with the 200gr MBW WFN and the 200gr Swift A-Frame.

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220 GR Rock River hard cast bullets, Blue Dot Powder,new Starline brass found an accurate load that shoots to the same point of impact as Buffalo Bear loads.

Buffalo Bore uses Rock River bullets if I recall. I use a heavier spring in a Glock 20 or a Springfield XDM , with 220 gr cast loads Buffalo Bore used to talk about how it changed the shot to shot velocity, helped a lot with accuracy.

Not much data out there for 220 gr cast loads in the 10 mm and factory loads are pushing the max so don't push it in an unsupported barrel.


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Kurt, I believe the bullet you're using is a Rim Rock 220grain HC not Rock River. That's the bullet Buffalo Bore uses in it's loads. --- Mel
BTW
Has anyone checked the difference in penatrasion between the 200 and 220 grain hard cast. Phil maybe

Last edited by olblue; 05/13/24. Reason: Added BTW

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Mel your right Rim Rock thanks, Kurt


kk alaska

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Mel your right Rim Rock thanks, Kurt


kk alaska

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Have any of you tried the 180 gr CKB bullets? I’ve got a fried that says that’s all he will use now in his 10mm

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Originally Posted by bulkie_roll
Blue Dot is your friend .... #9 is my second choice .

Agree on Blue Dot, I have a bunch of 215's loaded with it.


'Four legs good, two legs baaaad."
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Some of it's tragic,
But I had a good life all the way."
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I tried Blue Dot and found it too flashy for my uses. Longshot has been great. Accurate powders are rarely available here, but No. 9 there’s consensus it’s a good option.

I’m also curious about how much more penetration a 220 will get you over a 200.

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Accurate #9 has a nice controllable recoil impulse & low flash in full power 10mm 200 grain hardcast loads. Those attributes are important to me, haven't tried Longshot but some users reported sharp/snappy recoil characteristics.

I figured the 200 grainer would be a better compromise of velocity & peneration over the heavyweight 220 for my uses. Bought 200 of the Montana Bullet Works NOE version to experiment with.

41


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Originally Posted by 41rem
Accurate #9 has a nice controllable recoil impulse & low flash in full power 10mm 200 grain hardcast loads. Those attributes are important to me, haven't tried Longshot but some users reported sharp/snappy recoil characteristics.

I figured the 200 grainer would be a better compromise of velocity & peneration over the heavyweight 220 for my uses. Bought 200 of the Montana Bullet Works NOE version to experiment with.

41


You should like those.....my Kimber Camp Guard 10 does!


Frog---OUT!


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