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#6520889 - 10/31/16 09:37 PM Powder for .260 with 142 SMK?
TORNracer Offline


Registered: 02/05/09
Posts: 53
Loc: Roanoke, TX
Looking for a little guidance on what type of powder to use.

I'm having a full custom .260 Rem built on a Stiller Predator long action with a Rem Varmint contoured 1 in 8 twist 24" Bartlein barrel, should be done in the next month or so.

I have started gathering components (Lapua brass, 142 SMKs, CCI BR2s), but am at a loss for what powder to start with. This is my first time loading for the .260, I mainly load .308 right now.

All the research I've done seems to point to H4350, but it seems pretty dang hard to find. A good friend suggested H4831sc, which I do actually have on hand as well as Varget

What powders would you guys suggest as an alternative to H4350? Or should I just keep looking for it because it's THAT good....

Thanks in advance!

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#6521103 - 11/01/16 06:08 AM Re: Powder for .260 with 142 SMK? [Re: TORNracer]
dee Offline
Extreme Tracker

Registered: 04/10/10
Posts: 4664
Loc: Red River way
IMR 4451 is a great replacement for H4350.
_________________________
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#6521146 - 11/01/16 07:03 AM Re: Powder for .260 with 142 SMK? [Re: dee]
FiremanJG Offline
THF Celebrity

Registered: 12/16/08
Posts: 17893
Loc: Wolfe City, TX
Originally Posted By: dee
IMR 4451 is a great replacement for H4350.


Just ordered some since I'm getting low on H-4350. I'll work up a load with the new to me powder as soon as I get it.
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#6521168 - 11/01/16 07:27 AM Re: Powder for .260 with 142 SMK? [Re: FiremanJG]
dee Offline
Extreme Tracker

Registered: 04/10/10
Posts: 4664
Loc: Red River way
Originally Posted By: FiremanJG
Originally Posted By: dee
IMR 4451 is a great replacement for H4350.


Just ordered some since I'm getting low on H-4350. I'll work up a load with the new to me powder as soon as I get it.


It ran a touch faster burning in my 6mm creed but still gave great accuracy and single digit sd.
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"A vote is like a rifle; it's usefulness depends on the character of the user" Theodore Roosevelt

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#6521309 - 11/01/16 08:58 AM Re: Powder for .260 with 142 SMK? [Re: dee]
FiremanJG Offline
THF Celebrity

Registered: 12/16/08
Posts: 17893
Loc: Wolfe City, TX
Great news!

I spent some time researching substitutes for H-4350 in 6.5 Creedmoor. Of course Varget is listed, but with 2.5 gr less of a Max charge. I want the case as full as possible, and IMR-4451 listed a higher Max charge than H-4350 of 40.0 gr, which we all know is bs

Per Hodgdon:

H-4350 Max charge 40.0 gr (everyone knows they shoot between 42.0 and 43.0)

IMR 4451 Max charge 41.1 gr.

So 41.1 gr is where I am going to start, and carefully look for pressure signs.
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#6521416 - 11/01/16 09:55 AM Re: Powder for .260 with 142 SMK? [Re: TORNracer]
Rustler Online   content
Veteran Tracker

Registered: 03/01/07
Posts: 3211
Loc: Carrollton/ Young, Blanco coun...
Must be some discrepancy in load data or could be your talking about a different caliber or bullet weight than the OP asked about.

Mine shows .260 - 142gr smk, H4350 - starting 41.5gr, max 44.5gr.

Ive had very good results with .260 using all sorts of powders.
I used different brass & primers than you intend to, which may make a little deference.
My opinion in order based on accuracy & velocity in one Rem 700 .260 rifle.

H4350
H414
Norma MRP
IMR 4451
Win 760
H4831
Reloader 23
VV n560.

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#6521505 - 11/01/16 10:40 AM Re: Powder for .260 with 142 SMK? [Re: Rustler]
FiremanJG Offline
THF Celebrity

Registered: 12/16/08
Posts: 17893
Loc: Wolfe City, TX
I was talking 6.5 Creedmoor. It is within the paragraph.

Point being I was looking for a substitute powder, and that is what I went through to find one.
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#6521533 - 11/01/16 11:02 AM Re: Powder for .260 with 142 SMK? [Re: TORNracer]
TORNracer Offline


Registered: 02/05/09
Posts: 53
Loc: Roanoke, TX
Thanks for the feedback everyone! Hopefully Chad will see this and chime in too.

IMR 4451 sounds like a viable alternative.

JG- will you let me know how you like it in your 6.5 Creed? I figure if it works well for you, there's no reason it won't work for me in .260 since the two are very similar...

Rustler- thank you for that list, very helpful. I might start with the 4831sc that I already have since its on your list just to fireform the brass and see what the velocity is.

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#6521554 - 11/01/16 11:13 AM Re: Powder for .260 with 142 SMK? [Re: TORNracer]
ChadTRG42 Online   happy
THF Trophy Hunter

Registered: 09/16/09
Posts: 9408
Loc: Lewisville, TX
They have you on the right track. If H4350 was not available, the new IMR 4451 would be my next pick. It is very similar to H4350. H4831 would also work, but it's a heavily compressed load, depending on your seating depth. I knew several shooters who ran 4831 in their 260 around 46-47 grains with the longer barrels to get the speed up in competition. Another good choice would be Alliant's R16. It is their newer temp stable powder with similar burn rate as H4350. I have not played with it much, but the feedback from other shooters have been good. Also, Alliant 2000 MR is a decent pick. It is a powder that I think is a hidden jewel powder. I use it in my personal 308 Win loads with a heavy bullet. It is a more temp stable powder than varget, and is slightly slower burning. I know the engineer who created the 2000MR and 4000MR powder lines, and have spoken with him in length about these powders. The 2000MR would also be a good pick for the 260 Rem and 140 grain bullets. There are lots of options available other than H4350, that will be equally good. As a shooter, I always recommend having a back up or secondary powder to fall back on when you can not find your primary powder. In times as of right now (election year with the possibility of a Dem in office), it would be very wise to have a primary and secondary powder choice.
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#6521660 - 11/01/16 12:01 PM Re: Powder for .260 with 142 SMK? [Re: TORNracer]
jeffbird Online   content


Registered: 03/09/09
Posts: 1713
Another option is H414, which I tried when I could not find H4350.

Win 760 is the identical powder, just relabelled.

It is a fine spherical powder and works well with the full range of bullet weights.

Best of all, it is consistently findable. It is somewhat temperature sensitive, about 0.8 fps/degree.

Will try the new IMR powders next, when I run out.

fwiw - Been using it with 100 gr. Barnes TTSX at 3100+ fps and 100 gr. Partitions touching 3200 fps.

Both really put the zap on deer.

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#6522529 - 11/01/16 07:50 PM Re: Powder for .260 with 142 SMK? [Re: TORNracer]
stxhunter Online   content
Tracker

Registered: 03/04/08
Posts: 738
Loc: Fort Worth
I'm currently using H4831SC in my 260AI and getting 2935 fps with 129SST from a 24" barrel. The load is COMPRESSED, but no pressure signs so I'm wanting to change powders.

I've been wanting to try H4350, but haven't found any yet. RL17 is also on my "try" list, but I've read a few reports of inconsistency.

I'm also searching for IMR 4451 and IMR 4955.
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#6522688 - 11/01/16 09:03 PM Re: Powder for .260 with 142 SMK? [Re: TORNracer]
TORNracer Offline


Registered: 02/05/09
Posts: 53
Loc: Roanoke, TX
You guys are great, thanks for all the input!

I know where I can get some IMR 4451, so I think that will be what I start with. I'll likely try the 4831sc too as I already have it and I should be able to seat the bullets out pretty long.

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#6522719 - 11/01/16 09:20 PM Re: Powder for .260 with 142 SMK? [Re: TORNracer]
RiverRider Online   content
THF Trophy Hunter

Registered: 11/11/07
Posts: 6207
Loc: Wise Co.
I know a .260 is not the same as a .30-06, but some have found Ramshot Hunter to be an excellent substitute for H4350 in the '06 when you can't find it.



Code:
Cartridge          : .260 Rem
Bullet             : .264, 142, Sierra HPBT MatchK 1742
Useable Case Capaci: 45.662 grain H2O = 2.965 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 24.0 inch = 609.6 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 61000 psi, or 420 MPa
or a maximum loading ratio or filling of 105 %
These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

78 loads produced a Loading Ratio below user-defined minimum of 90%. These powders have been skipped.
Powder type          Filling/Loading Ratio  Charge    Charge   Vel. Prop.Burnt P max  P muzz  B_Time
                                      %     Grains    Gramm   fps     %       psi     psi    ms
---------------------------------  -----------------------------------------------------------------
Alliant Reloder-26                 104.7     47.4     3.07    2918   100.0    61000   10565   1.187  
Alliant Reloder-17                  96.4     42.6     2.76    2843   100.0    61000    9601   1.191  
Norma MRP                          105.0     46.1     2.99    2822    99.0    55805   10764   1.233  
Ramshot Hunter                     101.1     44.0     2.85    2813    99.8    61000    9874   1.201  
Hodgdon H414                        95.5     42.5     2.75    2806    99.5    61000    9866   1.204  
Winchester 760                      95.5     42.5     2.75    2806    99.5    61000    9866   1.204  
Alliant Reloder-19                 105.0     44.2     2.86    2794    98.3    59676   10092   1.206  
Vihtavuori N550                     97.7     42.0     2.72    2792   100.0    61000    9566   1.214  
Norma URP                          100.6     41.9     2.72    2792   100.0    61000    9436   1.209  
Accurate 4350                      100.0     42.1     2.73    2789   100.0    61000    9402   1.225  
Norma 204                          100.1     43.5     2.82    2785    98.3    61000    9847   1.198  
IMR 7828 SSC                       105.0     45.4     2.94    2784    96.5    56335   10462   1.224  
Winchester Supreme 780             104.0     46.2     2.99    2764    98.3    61000    9611   1.200  
Ramshot Big Game                    90.9     40.8     2.64    2763   100.0    61000    8964   1.210  
IMR 4831                           105.0     42.3     2.74    2760   100.0    59814    9205   1.228  
Vihtavuori N560                    105.0     45.2     2.93    2758    95.5    53157   10674   1.261  
IMR 4895                            90.5     38.1     2.47    2755   100.0    61000    8959   1.219  
Hodgdon Hybrid 100V                103.4     42.1     2.73    2753   100.0    61000    8667   1.209  
Alliant Reloder-15                  91.3     38.4     2.49    2749   100.0    61000    8932   1.219  
Hodgdon H4350                      102.7     42.3     2.74    2746    99.1    61000    9310   1.207  
Norma 203B                          91.8     38.6     2.50    2746   100.0    61000    8862   1.220  
IMR 4350                           100.8     42.2     2.73    2746    99.1    61000    9292   1.207  
Hodgdon H380                        92.7     39.9     2.58    2745   100.0    61000    9085   1.222  
Norma 203 old                       93.1     39.6     2.57    2738   100.0    61000    8734   1.233  
Alliant Reloder-22                 105.0     44.7     2.90    2736    97.3    52562   10350   1.272  
IMR 4320                            93.3     38.6     2.50    2732   100.0    61000    8611   1.205  
Hodgdon H4831 SC                   105.0     44.7     2.90    2732    95.9    57637    9776   1.225  
Accurate MAGPRO                    105.0     47.0     3.04    2731    93.5    51996   10630   1.278  
IMR 4007 SSC                        94.5     40.3     2.61    2724    99.1    61000    9159   1.219  
Hodgdon VARGET                      94.1     38.3     2.48    2715   100.0    61000    8632   1.211 
_________________________


Originally Posted By: Cleric
God I am hating caliber threads more and more

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#6522778 - 11/01/16 09:53 PM Re: Powder for .260 with 142 SMK? [Re: TORNracer]
TORNracer Offline


Registered: 02/05/09
Posts: 53
Loc: Roanoke, TX
RiverRider- thanks for the Quickload data!

Help me interpret what it spits out, I've never used it before. What are you looking for when selecting a few powders to start with out of all that information?

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#6522794 - 11/01/16 10:06 PM Re: Powder for .260 with 142 SMK? [Re: TORNracer]
RiverRider Online   content
THF Trophy Hunter

Registered: 11/11/07
Posts: 6207
Loc: Wise Co.
Well...I look for manageable case fill, high velocity, and 100% (or at least close) burn percentage. I also consider things QL doesn't readily disclose such as temperature sensitivity and sometimes whether or not a powder will meter well through a measure.
_________________________


Originally Posted By: Cleric
God I am hating caliber threads more and more

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