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7mm reload problems (ballistics)

 
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  #8  
Old 06-14-2010, 08:29 AM
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Re: 7mm reload problems (ballistics)

Quote:
Originally Posted by retiredcpo View Post

I am also leary of increasing the load accrding to my reload books and accurate the max load is 65 grs but according to nosler the max load is 63 gr two grain differance
I really dont want to push the pressure to high
retiredcpo
The brass you use will have an impact on the amount of powder/pressure. I am using Norma brass, and relative to the Federal brass, I need to use one more grain to get equivalent velocity. With the 160 gr accubonds, I use 65 gr RL-22, CCI-250 primers. This gives 2950 FPS (24" barrel). My older Sierra manual lists 66 gr. of RL-22 as the max with the 160 gr. Jacketed Fail Safe, Rem cases, 9.5 M primers.
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  #9  
Old 06-14-2010, 08:38 AM
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Re: 7mm reload problems (ballistics)

The accuate web site lists the max RL22 load as 65 grains
I was wanting to increase closer to 63 grains but I got a email from nosler with load data showing 63 grains as max
So I not sure how much I can go I dont want to over presure this gun.
any idea what one more grain would do to my MV?(62grains)

Last edited by retiredcpo; 06-14-2010 at 08:41 AM.
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  #10  
Old 06-14-2010, 08:49 AM
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Re: 7mm reload problems (ballistics)

Quote:
Originally Posted by retiredcpo View Post
The accuate web site lists the max RL22 load as 65 grains
I was wanting to increase closer to 63 grains but I got a email from nosler with load data showing 63 grains as max
So I not sure how much I can go I dont want to over presure this gun.
any idea what one more grain would do to my MV?(62grains)
For the components listed above (Norma, CCI-250, RL-22, etc), I was getting about 30 fps for each grain increment between 62-65 gr.
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  #11  
Old 06-14-2010, 09:20 AM
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Re: 7mm reload problems (ballistics)

guess I should add Im using winchester brass and winchester mag primers
visigoth if I use your numbers a a rough estiment of 30 fps per grain there is no way im going to get this load up to 2900 fps or better
guess Ill have to start to consider looking for a differant load
sure dont want to this one shoots good its just slow
I was messing with the balistic software and 2900 FPS is 2 moa better
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  #12  
Old 06-14-2010, 09:30 AM
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Location: Fort Morgan, Colorado
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Re: 7mm reload problems (ballistics)

I have not loaded for the 7RM but have loaded for it's parent case, which is the 264Win. I believe if you are wanting more speed from your rifle you need to switch to a slower powder such a H1000 or Reloder 25. You can probably find more speed at lower pressure with slower burning prepellant. BTW, reloading data is a guide, and your own rifle will tell you what the top end for the components you are putting together. I have had some rifles that easily digested loads that exceeded book max and others that topped out at less than max. Also, I have a 30/06SPR. that shoots a slower velocity load so well that I don't even try to speed it up and have shot deer at 600 yds with it. If you know where to hold to hit at longer ranges you will be the only one who will know how fast or slow your bullets are going.
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  #13  
Old 06-14-2010, 09:48 AM
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Re: 7mm reload problems (ballistics)

gunpoor
I tried H1000 and the groups were not good.
I have not tried RL25.
You are 100 percent correct this load shoots good so far (real good)
but I really would like to gain 1 to 2 Moa out to 600 to fully accomplish what I am trying to get this rifle to do I would like the leupold varmit hunter reticle to work but im off by 100 yards
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  #14  
Old 06-14-2010, 10:54 AM
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Re: 7mm reload problems (ballistics)

I guess what Im trying to say is Im frustrated because I dint understand why Im about 400 fps slower than I should be
100 fps or less I could understand but 400 fps is alot the way I see it.
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