Hunting Washington Forum

Equipment & Gear => Guns and Ammo => Topic started by: kbrowne14 on September 26, 2018, 09:25:14 AM

Title: 300 Win mag seating depth
Post by: kbrowne14 on September 26, 2018, 09:25:14 AM: I have Remington 700 long range 300 win mag. I have about 500 rounds through it. When I first got it, I tried using H-1000 but couldn't get any accuracy or consistency. Switched to H-4831SC and kept going. Well I want to try the H-1000, 212 ELD-X combo. I checked the lands on my rifle with that bullet, and I found that my lands were 3.660. My magazine length is right about 3.60. So my lands are always going to be about 60 thou away. Is that going to be a big deal for accuracy or Low SD's? My throat has eroded a little bit, I used to be 3.660 with the 208 A-Max, but now it is 3.675. I am going to shoot it tomorrow, and run it on the Magneto speed to see what I get. Am I going to run into problems?

Anybody else have these distant lands from Remington?
Title: Re: 300 Win mag seating depth
Post by: BULLBLASTER on September 26, 2018, 09:28:26 AM: I am shooting 215 bergers at 50 off the lands just fine. I’d guess with the Eld x you could do the same based on my experience with them in other calibers.

You could also add a Wyatt’s mag box to the rifle to seat longer too. :twocents:

H1000 and heavys is a great combo in the winny
Title: Re: 300 Win mag seating depth
Post by: kbrowne14 on September 26, 2018, 09:31:46 AM: Last time I tried the h-1000 and 208's, it didn't work out so well, nothing smaller than 2" groups. but that was about 400 rounds ago, and 3 years ago. So well will see, I am doing the ladder test tomorrow from 76 to 78.5. Are you compressed on those 215's?
Title: Re: 300 Win mag seating depth
Post by: BULLBLASTER on September 26, 2018, 09:59:35 AM: Quote from: kbrowne14 on September 26, 2018, 09:31:46 AM
Last time I tried the h-1000 and 208's, it didn't work out so well, nothing smaller than 2" groups. but that was about 400 rounds ago, and 3 years ago. So well will see, I am doing the ladder test tomorrow from 76 to 78.5. Are you compressed on those 215's?

No not compressed at all at 78 grains. My oal is very long tho at 3.75+

You will hit pressure before 78.5 grains. Depending on Brass I’d guess you will top out in the 77 grain range at That length
Title: Re: 300 Win mag seating depth
Post by: jasnt on September 26, 2018, 10:14:30 AM: I shot 210 bergers in my old barrel and shot well with as much as .185” of jump.
Title: Re: 300 Win mag seating depth
Post by: b23 on September 26, 2018, 11:04:07 AM: As was already mentioned, if you have an extended mag put in your rifle it'll open up your options. It's not a very expensive mod and just about any gunsmith should be able to do the job for you.
Title: Re: 300 Win mag seating depth
Post by: Mulie87 on September 26, 2018, 11:06:07 AM: I shoot 200gr ELDX with IMR4831 and 200gr AB’s with H4831 at .020 off lands. Shoots 1/2moa groups put to 550yds. This is a Remington Sendero .300 win mag.
Title: Re: 300 Win mag seating depth
Post by: 92xj on September 26, 2018, 11:27:16 AM: I know for some that load date is like big buck honey holes but....

Mulie87, if you don't mind, what gr h4831 do you run pushing those 200ABs?
Title: Re: 300 Win mag seating depth
Post by: kbrowne14 on September 26, 2018, 11:40:19 AM: I run 69 grains of h4831SC with my 200 NAB. I’m moving about 2840 FPS and I used to be about .015 off lands, but now I am more like .030.

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Title: Re: 300 Win mag seating depth
Post by: Jason on September 26, 2018, 02:19:12 PM: What charge are you guys running for 180's with H4831sc and what are you seeing for speeds? Lately I have been battling H1000 and groups are horrendous.
Title: Re: 300 Win mag seating depth
Post by: Oh Mah on September 26, 2018, 03:59:46 PM: :yeah: they like the heavies,better grouping with the heavies regardless of powder brand. :twocents:

What primers are you (the ones having problems with h1000) using?A couple of the shooters from this forum put me onto the fed 215's and my grouping closed with h1000. :tup:
Title: Re: 300 Win mag seating depth
Post by: jasnt on September 26, 2018, 04:05:58 PM: I’ve had my best groups with h1000, full case(just the slightest crunch) and cci 250’s and heavies. 210 bergers and 74.8 gr h1000 Nosler brass. Bto 2.796 measured with Hornady gage. 2765fps es of 3. 1” at 200
Title: Re: 300 Win mag seating depth
Post by: Jason on September 26, 2018, 07:59:38 PM: I've always used WLRM primers for the 300wm. H1000 79.3gr 180ab's
Title: Re: 300 Win mag seating depth
Post by: Biggerhammer on September 26, 2018, 08:09:53 PM: I prefer speed with the .300 Win Mag when it comes to your average big game shots, point blank to 500 yards or so. RL-22 would be my first choice, IMR 7828 my second.
Title: Re: 300 Win mag seating depth
Post by: kbrowne14 on September 26, 2018, 08:59:47 PM: I am looking for speed, I have a load with h-4831 that is accurate, but I want some speed to go along with the 212’s, because it’s for hunting.

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Title: Re: 300 Win mag seating depth
Post by: Mulie87 on September 26, 2018, 11:47:33 PM: 70gr of the H4831. It’s pushing the 200gr ABs at 2,800fps but that’s the most accurate load at .25” at 100yds and 4” at 550yds. During load development I got higher velocities and even 3000fps with IMR4831 but accuaracy wasn’t that great. So I settled with accuracy over velocity. I can still reach out there.

I know some guys swear by RL22 for the .300, but I can’t get past the temperature sensitivity issues since I hunt in Montana where it gets damn cold.

After this hunting season i’m going try the 190gr Accubonds (due to cheaper bullet prices) and see how they work amd what kind of velocity I can get.
Title: Re: 300 Win mag seating depth
Post by: Mulie87 on September 26, 2018, 11:52:43 PM: Federal magnum rifle match primers for me. Seem to do the trick, so I bought a brick of 1000ct.
Title: Re: 300 Win mag seating depth
Post by: Curly on September 27, 2018, 04:34:08 AM: Dont overlook RL26 in the 300wm. :twocents:
Title: Re: 300 Win mag seating depth
Post by: zwickeyman on September 27, 2018, 05:31:03 AM: RL 26 here

75 gr with 200 grain Partitions @ 2930 fps .050 off. H1000 works well for me also
Title: Re: 300 Win mag seating depth
Post by: b23 on September 27, 2018, 09:59:00 AM: I know it's typically hard to find but if you can get your hands on some Vihtavuori N570 I think you'll be pleasantly surprised with the results. Viht also has a new powder, N565, and it sounds like it's going to do very well in these size cases, too.
Title: Re: 300 Win mag seating depth
Post by: kbrowne14 on September 27, 2018, 04:35:36 PM: Well I did an H-1000 ladder test today and I was not disappointed. Started at 76-and went to 78. I never had an SD over 5. Seated out to 3.600 (mag length).
76 was at 2910 with an SD of 3.6.

76.5 was at 2915, with an SD of 4.6.

77 was at 2941 with an SD of 4.6. It was also about 3/8” group

77.5 was at 2960 with an SD of 2, but slight pressure, very slight ejector swipe, and a small crater. 3/8” group.

78 was at 2980 with an SD of 5. A little too much pressure though. Ejector mark was deeper, and crater was deeper.

I think I am going to try the 77 grains. There was a very slight primer crater, but nothing else.

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Title: Re: 300 Win mag seating depth
Post by: BULLBLASTER on September 27, 2018, 06:22:18 PM: Quote from: kbrowne14 on September 27, 2018, 04:35:36 PM
Well I did an H-1000 ladder test today and I was not disappointed. Started at 76-and went to 78. I never had an SD over 5. Seated out to 3.600 (mag length).
76 was at 2910 with an SD of 3.6.

76.5 was at 2915, with an SD of 4.6.

77 was at 2941 with an SD of 4.6. It was also about 3/8” group

77.5 was at 2960 with an SD of 2, but slight pressure, very slight ejector swipe, and a small crater. 3/8” group.

78 was at 2980 with an SD of 5. A little too much pressure though. Ejector mark was deeper, and crater was deeper.

I think I am going to try the 77 grains. There was a very slight primer crater, but nothing else.

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Called it... :chuckle:

2940 is smokin that bullet out there from a 26 inch barrel
Title: Re: 300 Win mag seating depth
Post by: kbrowne14 on September 27, 2018, 06:35:47 PM: That you did. But yes, great velocity out of it

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Title: Re: 300 Win mag seating depth
Post by: Oh Mah on September 27, 2018, 08:02:35 PM: :tup: what bullet?
Title: Re: 300 Win mag seating depth
Post by: kbrowne14 on September 27, 2018, 09:55:43 PM: 212 ELD-X

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Title: Re: 300 Win mag seating depth
Post by: Oh Mah on September 27, 2018, 10:10:29 PM: Ok thanks