The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Rifles Medium Bore Rifles loading the 175 long range accubond, in 7x57Go | New | Find | Notify | Tools | Reply | |
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Lads I am about to try to load this weight of bullet for the first time, many manuals suggest that IMR 4350 is a good powder to use, any other suggestions you gentlemen may have for me? Gracias amigos | ||
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Waters list Imr 4350 H4831 and H4895 As appropriate for 175g bullets | |||
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The accubonds are just too long IMO, I load the 175 gr. Nosler partition in my long magazine, long throat to match with the bullet seated out to about .284 deep in the case..I get 2647 FPS with a 10 shot average taking out the high and low round, this has been my elk load since 1982 as I recall..I only use H-414 in my 7x57s, its a ball powder version of 4350 and you can get more powder in the case...I had this load tested and its a safe max in my gun, but probably not in a standard box and throat. With a standard box and throat rifle I would start with book max and work up a grain at a time. I think you could get pretty close to 2500 FPS, maybe more? I won't give my loads because of that reason, someone might miss the part about the long throat and magazine box. this is just another method of improving a cartridge without changing the original name..It has worked for me over the years with a number of calibers, and usually with a specific powder. Ray Atkinson Atkinson Hunting Adventures 10 Ward Lane, Filer, Idaho, 83328 208-731-4120 rayatkinsonhunting@gmail.com | |||
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 Words of wisdom!If you start pushing the bullets into the powder room you may start running into pressure problems.From what I know and have read, Accurate 4350,H414 , IMR 4831 or Data powder 86 would be the powders likely to give you good, safe results.  With a strong contemporary action, a 24" barrel, a magazine and deep throat to allow greater AOLs and working at today's recognized safe pressures a velocity of 2600 fps might be approached.FYI With 8208 and a 19" barreled Mod. 98 have safely obtained 2477 fps. Same rifle and Accurate 2520 I got 2429 fps..There were no high pressure signs in either loading  rogerOld age is a high price to pay for maturity!!! Some never pay and some pay and never reap the reward. Wisdom comes with age! Sometimes age comes alone.. | |||
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Just to throw more options at you, you might consider RL19, RL22, N-204, or MRP for the space behind your 175 grainers. In the small 7x57 case, I tend to look for powders with a high specific density (weight of powder compared to equal volume of H2O) if I want high velocity. That way, I can get a little more powder in the case. You should be able to get somewhere near 2600 fps safely with one of the "heavy" powders. NRA Life Member DRSS-Claflin Chapter Mannlicher Collectors Assn KCCA IAA | |||
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I would think 19 and 22 would work with 175's although I always could get more speed with 160's with H414. I have never seen a reason for 175's, a 7Mag is another story. A shot not taken is always a miss | |||
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If your Brno is unaltered, its the std 7mm mauser throat, and likely exactly the same as the 1980s issue M70 Featherweight 7x57 I had. | |||
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#1. H414 #2. IMR4350 Both of these powders preform great in my 7mm's. H414 gives me more room for the larger bullets and allows deeper seating when loading rounds for use in my intermediate action guns. | |||
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Trax, All Brno mod 21, and 22s, utilized a small ring action, 30-06 length magazine, and have a long throat to take a 175 gr. Barnes X or Woodleigh seated .284 deep into the case and that's about to the shoulder shoulder junction. That being the case it will take considerably more H414 than any of the loading books and a bit more than the standard mod 70...Keeping in mind that book recommendations allow for the use of Rem falling blocks, mod 95, and mod 96 Mausers. Its about frivoulous law suits..thus most 7x57s end up terribly underloaded, inasmuch as a good Mauser or mod 70 can take the same PSI as a 270 or any other modern caliber, 55,000 to 60,000 or a bit more at max. Ray Atkinson Atkinson Hunting Adventures 10 Ward Lane, Filer, Idaho, 83328 208-731-4120 rayatkinsonhunting@gmail.com | |||
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The problem with Accubonds in heavy weight, even in my .338 Win. is they are so long that they impede powder capacity and you just cannot get enough velocity to suit me..but Accubonds are excellent bullets and you don't sacrifice a thing by using the 150 or 160 gr. Accubonds. Same as you would with Barnes bullets..The tipped heavy Barnes would not suit me in the smaller cases either. I would perhaps use the 175 gr. Accubond in a 7 STW I suspect as that huge case changes the picture. Ray Atkinson Atkinson Hunting Adventures 10 Ward Lane, Filer, Idaho, 83328 208-731-4120 rayatkinsonhunting@gmail.com | |||
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I'm not really sure why they even make both the 168gr and 175 grain Accubond LR as they are so similar in weight; and tested (not advertised) BC at 0.649 and 0.647 (G7 0.332 and 0.331) respectively in a 7 twist according to Bryan Litz. | |||
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Then all you need is a 7" twist barrel. +-+-+-+-+-+-+ "A well-rounded hunting battery might include: 500 AccRel Nyati, 416 Rigby or 416 Ruger, 375Ruger or 338WM, 308 or 270, 243, 223" -- Conserving creation, hunting the harvest. | |||
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I mostly use the 175 gr. Nosler partition at a tad over 2600 FPS in my long throated 7x57s, and I have gotten 2700 FPS and it did well..but it was max and 2600 was a milder load, so I settled on that. .The partition opens up on impact then expands less than a Accubond but penetrates better, and its very effective on small and large animals alike.. The accubond was accurate in my 9 inch twist but did take up a lot of powder space and I was getting just a tad less than 2500 FPS..I would suggest if one wants t use the Accubond then go with the 140 gr. in the 7x57..and stick with the Rem Corelokt, Nosler partition, in the 175 gr. wt., and the std. 175 gr. Hornady shows a lot of probability, but I have only shot a Mule deer with it so school is still out on that one, but it handled a couple of elk real well for a friend of mine.. Ray Atkinson Atkinson Hunting Adventures 10 Ward Lane, Filer, Idaho, 83328 208-731-4120 rayatkinsonhunting@gmail.com | |||
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The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Rifles Medium Bore Rifles loading the 175 long range accubond, in 7x57
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