I need a little reloading advice

Discussion in 'Reloading' started by tysn, May 3, 2010.

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  1. tysn

    tysn Member

    Mar 19, 2010
    Well my father died and he left me his rifles of which are a 300 icl, 7mm rem mag, 6mm rem, and 30-30 win. Now I have some of his reloading gear but I do not have any of his reloading data other than what he has on the boxes of shells.

    The 6mm he has a
    • 100gr sierra using 34.5gr of imr 4350

    The 7 mag he has 3 different loads
    • 175gr boat tail sierra using 76gr of h870?
    • 160gr barnes x using 64.5gr of h4831
    • 160gr speer mag tip using 53gr of 4060?

    Finally the 300 ICL Grizzly
    • 165gr Barnes X using 78gr of imr4350
    • 165gr nosler ballistic green tip using 84gr of h4831?

    I hear that the 300 icl is somewhere ballisticly between the 300 weatherby and 300 ultra mag.

    According to Wikipedia the 300 only has a case capacity of 82.5 grains, is that 84 grain charge a good idea being I am having to relearn how to reload? gun)

    Second what’s the max powder capacity of the 7mm rem mag?

    Does anyone have any loads they could recommend ?
    Any advice would be greatly appreciated.
  2. boomtube

    boomtube Well-Known Member

    Oct 8, 2007
    First thing you need to do is get a proper reloading manual. Not only do they have loading data the first part of most manuals includes a lot of instructions on the basics of loading.

    That "case capacity" you read about is usually in water. It is only checked to get comparisons between cases, powder capacity will vary by the type of powder.

    Unless your dad died in a KABOOM, he probably knew what he was doing, trust his info.
    Last edited: May 3, 2010
  3. BountyHunter

    BountyHunter Well-Known Member

    Jun 13, 2007
    PO Ackleys Handbook Volume 1 ( year 1962) on Page 441 gives load data for the ICL Grizzley (ICL Improved 300 mag). Basically same as the 300 Ack Imp weatherby.

    However it lists it for 150 and 180 grain bullets and IMR 4350

    data for the 150 is 80.0 grains (MV is 3590 fps)

    Data for the 180 is 75-81 grains. (go figure how it is higher for the 180) MV is 3300-3460 fps)

    Looks like the loads are in the range.

  4. tysn

    tysn Member

    Mar 19, 2010
    could you do me a favor and scan me a copy of all the 300 icl data out of that ackley book?
  5. Kevin Thomas

    Kevin Thomas Well-Known Member

    Feb 16, 2009

    Take it easy with the Ackley data if BountyHunter can scan it for you. Parker Ackley was an innovator, a fine gunsmith and a prolific writer, but he wasn't bashful about tipping the powder. You'll find many of his loads to be, shall we say, REAL HOT! Back them off at least 10% to start, and work up slowly from there. Keep an eye on the pressure signs, and act accordingly.

    I think the Ackley books, Vol. I & II, are still available. Seems to me that Precision Shooting did a reprinting of these some time back, and you may still be able to find them. Great reference books, fascinating info from start to finish, but just be careful with his load data.

    Kevin Thomas
    Lapua USA
  6. bigmoose

    bigmoose Member

    May 31, 2010
    If you are still in need of 300 ICL Grizzly reloading advise, I may be able to help. I know there is not much out there for that caliber but I've had mine for about 35 years and it is my favorite rifle. I know of two other rifles that see use every year out in the field also. My Dad has one and a good friend also shoots one. All three rifles are re-chambered pre-64 Winchester model 70's that started out as 300 H&H. If you have one of the custom jobs that Juenke's built then you have quite a fancy gun ! They were good shooters too and made good long range rifles. I remember a photo hanging in their shop of a mule deer buck that Arnold shot at 700 plus yards.gun)

    Anyway, I do not load any of the lighter weight bullets in mine. My Dad and I both shoot 200 gr. bullets. Used to be we could only find 200 gr. Speer Spitzers and that is what we used for many years. Even they were special ordered. You can not hardly beat 200 gr. Nosler Partitions although I've loaded up some 200 gr. Accubonds lately and find them very accurate. Looking forward to the new (this year) 200 gr. tipped TSX's.

    One thing I should mention is the case selection. You can use 300 Weatherby and 8mm Remington Mag factory cases by just running them through your sizing die and trimming them all to the same length. Pick the shortest one and go from there.

    The 300 ICL was based on the 300 H&H case and you can make your own. This can be a pain as the 300 H&H case has a long taper with little shoulder. When you fire form the case it will have a very pronounced shoulder. You can load reduced 150 gr. loads but you will still lose many cases to splitting necks. The best way is to prime the factory case and load 25 grains of Red Dot or Bullseye and fill the remainder of the case with Cream of Wheat (dry). I was told to put a little wax (car wax) over the mouth and then fire in your rifle. I could not figure out the wax part and just held the gun upright and carefully loaded each round into my gun and fired them. I've made a couple hundred using this method and have not lost a one. The new case will have the most capacity of the three and you may be able to load it a little hotter (or not). Run theses through your size die and trim them to the same length. Again, find the shortest one and trim them all to that length. Max case length is 2.85 inches. Trim cases to 2.75 inches although I don't think you will find any that even come close, just make sure they are all the same length.

    It is best not to mix case types when working up a load. The easiest is the 300 Weatherby case from Remington as these are usually cheaper than the Weatherby (Norma) made cases. You can just load these up to full charge and fire them. In my gun, they are still accurate. Your hunting loads should all be at least once fired to gain the most accuracy. Size and trim cases each time you fire them.

    I trim to 2.815 and my OAL is 3.610. Make sure these will fit in your magazine.

    Loads in my gun are : 200 gr. Accubond (or Nosler Partition)
    78 grs. IMR 7828
    215 Federal primer
    This load is a Max load and is right at 3000 fps.

    200 gr. Accubond (or Nosler Partition
    76 grs. H 4831
    215 Federal primer
    This load is a Max load and around 2900 fps

    My Dad's gun will take another grain of powder and not show pressure signs. Each gun is different and you need to start 3 to 4 grains lower on the powder and work up.....carefully ! You will need a micrometer. To check for signs of pressure, look at the base of the case for imprints of your bolt face, flattened primers, and measure the belt on the case. If any have expanded over .532 throw them away and back off the load by at least one grain if you have been coming up 1/2 gr. at a time.

    My friend shoots 180 gr. Nosler Partitions only. He does not reload. His brother loads up his ammo and uses 76 grs. IMR 4350 with a large rifle magnum primer. That is all I know about his load. I would guess this also a Max load.

    The thing with Juenke Saturn was that each gun was a custom gun with custom loads designed for each rifle. When you bought a ICL from them, they would work up specific loads for that gun and that gun only. I have a copy of their gun line and a few loads for each of their calibers. They did not go into great detail about loads. The only powder they used was IMR 4350 for the 300 ICL Grizzly.

    There is one 150 gr. load and it is 80grs. 4350 for 3590 fps. I would guess this to be a Max load also as they really touted their velocity figures.

    I hope all this helps. PM me if you need more help or have more qustions

    Last edited: Jun 13, 2010
  7. DANNY-L

    DANNY-L Well-Known Member

    May 19, 2009
    If it were me I would pull the bullets,dump the powder,remove and discard the primers,get a manual (Lyman is a good one,lots of information & data) and start new. Recording all your loads.