300 Wilson Ham’r

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Mike7.62
Silent But Deadly
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Location:Mid TN
Re: 300 Wilson Ham’r

Post by Mike7.62 » Fri Feb 14, 2020 8:42 pm

As they say in Hollywood, "Good shootin' Tex!".

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djones
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Re: 300 Wilson Ham’r

Post by djones » Tue Apr 07, 2020 11:19 am

hunting has certainly slowed down, but i managed to get off a shot now and then...

https://youtu.be/vWNoJJo3GQY

gnfiter3
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Re: 300 Wilson Ham’r

Post by gnfiter3 » Tue May 12, 2020 10:35 am

wildfowler wrote:
Sat Dec 14, 2019 9:06 pm
rebel wrote:
Fri Dec 13, 2019 9:30 pm
wildfowler wrote:
Fri Dec 13, 2019 4:21 pm



Well yeah, there’s that. I just assumed we were talking about AR15.
I know you were 8) I just want folks to recognize that there is nothing new under the sun when it comes to cartridge design - to include the millennial operators favorite, 6.5 CM. The hamr, when loaded to 2.26 just barely bridges the gap between 300 BLK and something over 30/30. Nothing new under the sun, just way cooler names.
I want them to go ahead and start making 30BR factory brass. Just think what doors that might open......
I waited to get into the 300 Black, and now, here comes the HAMR. Must be that Black Rifle Disease I suffer from, to even be interested in the HAMR. Ar-15 in 223, 300 Blk, and an AR-10 in 308 should be enough. Just love those Black Rifles.

eugenesan
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Re: 300 Wilson Ham’r

Post by eugenesan » Tue May 12, 2020 11:23 pm

I am considering getting into 300ham'r and having hard time deciding on barrel length/profile.
It would be nice to collect some data to be able to calculate velocity loss per inch.
Any input will help.

@djones
Which barrel length/profile do you have?

eugenesan
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Re: 300 Wilson Ham’r

Post by eugenesan » Wed May 13, 2020 2:44 pm

I've found some information regarding 300ham'r barrel length vs velocity (Posted by Bill Wilson).
Seems like velocity loss per inch is comparable to 300blk (under 20fps per inch).

Also I did some comparisons for 16" barrel with simulated data from GRT (https://grtools.de/) and there is a consistant 300fps advantage for 300ham'r.

Source: https://texashuntingforum.com/forum/ubb ... ost7507221

Code: Select all

BARREL LENGTH EFFECT ON VELOCITY
300 HAM'R

125 SIERRA SBT PH 20" bbl 2534 FPS
125 SIERRA SBT PH 18" bbl 2498 FPS (-36)
125 SIERRA SBT PH 16.25" bbl 2486 FPS (-12)
125 SIERRA SBT PH 14.5" bbl 2441 FPS (-45)
125 SIERRA SBT PH 12.5" bbl 2367 FPS (-74)
TOTAL VELOCITY LOSS FROM 20" TO 12.5" 167 FPS

130 SPEER FNHC 20" bbl 2485 FPS
130 SPEER FNHC 18" bbl 2460 FPS (-25)
130 SPEER FNHC 16.25" bbl 2438 FPS (-22)
130 SPEER FNHC 14.5" bbl 2412 FPS (-26)
130 SPEER FNHC 12.5" bbl 2346 FPS (-66)
TOTAL VELOCITY LOSS FROM 20" TO 12.5" 139 FPS

150 SPEER FNHC 20" bbl 2202 FPS
150 SPEER FNHC 18" bbl 2194 FPS (-8)
150 SPEER FNHC 16.25" bbl 2171 FPS (-23)
150 SPEER FNHC 14.5" bbl 2146 FPS (-24)
150 SPEER FNHC 12.5" bbl 2105 FPS (-41)
TOTAL VELOCITY LOSS FROM 20" TO 12.5" 97 FPS
eugenesan wrote:
Tue May 12, 2020 11:23 pm
I am considering getting into 300ham'r and having hard time deciding on barrel length/profile.
It would be nice to collect some data to be able to calculate velocity loss per inch.
Any input will help.

@djones
Which barrel length/profile do you have?

djones
Member
Posts:31
Joined:Thu Jul 23, 2009 10:55 pm

Re: 300 Wilson Ham’r

Post by djones » Thu May 14, 2020 12:07 pm

i'm shooting an 18" barrel. i think most of my buds' hamrs are 16. real world... prolly doesn't matter that much.

https://youtu.be/8tVMGGDqPvI

djones
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Re: 300 Wilson Ham’r

Post by djones » Thu May 14, 2020 12:26 pm

sounds strange i know, but i don't know what profile i'm shooting, lol. this is from a discussion wilson had with someone on barrels on thf..

Sage: I was leaning towards the LE profile. The reason for the heavier barrel choice was recoil management, as I don't intend to use a muzzle brake. Hunting the heavy brush in the Appalachian mountains and I don't want twigs or other debris to get caught up in a brake or flash hider. But that's no reason to go crazy heavy. I'll keep watching the website closely. A new 300 HAMR is soon to be assembled. BTW I'm really liking the 135 grain bonded bullets. A great all around load!


Wilson: Sage, as a FYI our 5 best selling barrels listed in order are:

18" Tac Hunter fluted/threaded
16" Ranger round/threaded
11.3" SBR round/fluted
18" BW Ranch round/threaded
18" Tac Hunter round/threaded

eugenesan
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Posts:12
Joined:Mon Jun 24, 2019 2:38 pm

Re: 300 Wilson Ham’r

Post by eugenesan » Thu May 14, 2020 3:37 pm

@djones
Thanks for the information.
At the moment I am leaning toward 16" Ranger since it's the lightest (26Oz) and only ~20fps "slower" than the "standard" for the caliber 18".

BTW,
I am a bit confused regarding 300ham'r brass forming from 223 :?:
Some people mention specialized/intermediate mandrels to neck-up the cartridge before the sizing.
On other, hand some people claim they just trim the case to ~1.6", size it in (Lee Full Size Die) and than do the final trim.
II would be very helpful if someone could share their experience.

djones
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Posts:31
Joined:Thu Jul 23, 2009 10:55 pm

Re: 300 Wilson Ham’r

Post by djones » Fri May 15, 2020 2:41 pm

i gave the 223 brass a try, and i'd still use it as a last resort if i had to, but here's my experience...

trim cases with giraud trimmer – that works great
chamfered the mouth of course
light lube on case although i don't think the 223 body touched the die wall.
dipped mouth in motor oil
sized with lee hamr die
works fine until you crumple a case or rip a neck off... inside the die... with the expander still in it.
i destroyed a couple decapping stems hammering them out. they are secured with a slotted locking bolt that applies pressure to the sides, so they slip too. for lack of a better description... total crap. maybe i just don't know how to use it properly.

had to get replacement mandrels from squirrel daddy. better taper. scored the stem sides for better traction but they still slip. i just couldn't tighten the bolt hard enough to get a good grip on it. junked it for the rcbs. for those of you laughing and wondering how i could be such an idiot, i'll tell you... yea – i'm THAT guy!
after i broke off a few more necks, i abandoned the whole idea of converting 223 brass.

to be fair, a buddy annealed his brass and claimed very few failures. most of my 'advisors' suggested i go through a couple of calibers instead of jumping straight to 30 cal. that may all be good advice but it's waaay more time than i want to put into loading. new hamr brass isn't that expensive.

correction... i sized first and then trimmed with the giraud blkout/hamr pilot
Last edited by djones on Fri May 15, 2020 3:23 pm, edited 1 time in total.

djones
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Posts:31
Joined:Thu Jul 23, 2009 10:55 pm

Re: 300 Wilson Ham’r

Post by djones » Fri May 15, 2020 2:49 pm

watched these hogs come in across a wheat field last night and tried to intercept them. i was sneaking down the dirt road but was in a low spot when they came out right in front of me. the closest one saw me and was about to blow out of there. he would have taken the whole herd with him, so i had to shoot before i was ready. didn't even get the scope nuced. got a few but i was too low to see the herd a few seconds after they charged back in to the wheat.

https://youtu.be/SOMAmTF6vyY

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