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LOAD DATA

 
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  #8  
Old 07-27-2003, 03:46 PM
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Join Date: Jul 2003
Posts: 33
Re: LOAD DATA

Hey thanks for the info.
The 3600 fps is what they have on their load data page. Please go to GS custom bullets. This is out of a 30-378. I have read their website and it is suppose to have something to do with the barrel bands of the bullets. Please take a look and tell me what you think. I have talked to a couple people that says they do as advertised. I have no persnal experiance with them nor have I seen anyone cornograph any either.
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  #9  
Old 07-28-2003, 02:13 AM
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Join Date: Jul 2003
Posts: 33
Re: LOAD DATA

On the Lapua Loading page it has the 30-378 pushing 200 grain bullet at max 3133 fps. the 338 lapua on the other hand 3248 max load their is an 1 inch diferance in the barrels. I think that you should be able to better with a lighter 30 cal round in the Lapua. I don't think that over 3400 fps with a 178 grain bullet is any thing to snezz at.
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  #10  
Old 07-28-2003, 02:57 AM
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Join Date: Jun 2001
Location: WA
Posts: 84
Re: LOAD DATA

Finris, I have done a small amount of testing with the 173 hv in my 300 RUM. I have a 29.5", 1-10 twist barrel. The fastest I have gotten without pressure signs is 3550 using reloader 25. I was at 96.5 grains. Keep in mind that you will really need to be touching the lands and grooves to get the accuracy out of these. I have been using the 130 HV in my 7 STW for a couple of years and those work great for me. I haven't gotten the accuracy from the 173's that I was looking for. It was along the lines of 1.5 MOA out of a gun that shoots .3 MOA consistently with the 240 MK.
Vince
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  #11  
Old 07-29-2003, 12:57 AM
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Join Date: Jul 2003
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Re: LOAD DATA

the 173 HV is suppose to use 1:9 twist do you think that might have something to do with it?How long are your 240 that you are using?How long is the 173? I think 3500 fps is good.
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  #12  
Old 07-30-2003, 05:09 PM
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Join Date: Jun 2001
Location: WA
Posts: 84
Re: LOAD DATA

Finris, the 240 MK also calls for a 1-9 twist. I spoke to Gerard the owner of GS customs a few months ago, him and I both agreed that at those velocities his bullets should be stable out to at least 1300 meters. I have a longish throat in my rifle which makes it difficult to seat the bullets out to touching the lands. I feel that with this design I was getting a sideways jump with the bullet. If you can you may want to try seating them into the lands. I only had one box of the bullets on hand so I just did some limited testing. I shot one 3 shot group out at 706 yards and the same load that produced 1.5 MOA at 100 y, printed .94 MOA at that range. This would possibly indicate that it is taking a while for them to settle down possibly due to lack of twist. With the increased case capacity you will have over my 300 RUM, you may want to try going one step slower with the powder. I use a compressed load in my 7 STW and have no problem getting the 130 HV bullets to shoot in the .2 to .3 range consistently.
Vince
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  #13  
Old 07-30-2003, 05:23 PM
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Join Date: Jun 2001
Location: WA
Posts: 84
Re: LOAD DATA

Finris, I was just looking at my notes on the pressure loads that I fired with the 173 HV. They read something like this.

N560@89.7 grains, 3417 fps (No pressure signs)could try 91 and 92 grains.

N165@90.5 grains, 3410 fps (ejector marks, MAX LOAD) need to drop 1 grain.

RL22@92 grains, 3541 fps (Max Load, light ejector marks)

RL25@97 grains, 3575 fps (est max working load)drop to 96.5 shoot groups.

Ramshot Big boy@99.5 grains, 3540 fps (est. max working load)

I was using Federal 215M primers for this test. It was conducted in 55 to 70 degree F temps, at 480 ASL. I shot the load with RL25@96.5 grains using Rem 9.5 primers and velocity dropped to 3480 fps.

THIS SHOULD GIVE YOU A RUFF IDEA OF WHAT TO EXPECT. You should have an extra 5 or 6 grains of case capacity to work with and this may help.
Vince
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  #14  
Old 07-30-2003, 10:55 PM
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Join Date: Jul 2003
Posts: 33
Re: LOAD DATA

Hey Vince,
Thank you very much,for all the info.I mean just this basic info saves me alot of time and money.I think I will go with a 30" barrel and an improved 30-338 lapua.You also answered another question of mine that I haden't asked is what other bullets will work well in the 1:9 twist if I don't like the 173.Thank You and everyone who gave information.
Nathaniel
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