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View Full Version : SEEKING HELP WITH LOAD DEVELOPMENT: Accurate 5744 & 180 GR. WW BULLET IN 7MM-08



michiganmike
12-30-2014, 08:37 PM
Good evening friends, as we prepare to enter a new year.

I am the proud and happy owner of a Ruger Hawkeye Compact rifle in 7mm-08. For this rifle I have two moulds. The first is the Lyman #2660405. The second is the RCBS #82018.

The Lyman is a Loverin designed mould, round nose, which is intended to yield a 150 gr. bullet. For me, using WW, it gives 145 gr. bullets. The second is the RCBS #82018 which RCBS states will give up a 168 gr. bullet. For me, using Lyman #2 I consistently get 180 grain bullets. That's odd, but OK with me. And unlike the Loverin bullet, the RCBS has a meplate of .136" according to my caliper and tired old eyes.

As another contributor wrote in praise of the Loverin designed mould, it is consistently very accurate. In my Ruger it likes 28 to 30 grains of H4895. While 145 grains would be fine for Michigan deer at the range I would be shooting, I would like to develop a consistently accurate recipe for the 180 gr. bullet.

Thus far I have developed "OK" loads with H4350 and HBLC2. But they are not dependably, consistently accurate. What do I mean by lack of consistency? For example, I shot four 5 shot groups at 100 yards from a bench. I used H895, Varget, H4360 and BLC2. Typically Three of the rounds would be 2 MOA at or near target center. The other two would be wild, four inches high, or to the right. Or, the group would expand to 3 or 4 MOA. I loaded all of the rounds on the same day, using the same step by step process.

During a recent trip to Classic Arms, my local gunshop, I found two 1 lb. cans of Accurate 5744 sitting on the shelf, bearing a price tag of $30 per. I grabbed them up, having read about the value of 5744 for reduced loads. Classic Arms has been owned by the Evanoff family for the past 50 years and are great people to do business with.

I like the idea of the heavier bullet for deer. I hope that 5744 will yield a reliable, dependable, accurate round for the 180 gr. bullets the RCBS mould gives me.

If anyone has any data, or any experience with 5744 and reduced loads with heavy bullets in the 7mm-08, please advise me. I am willing and eager to be "schooled." Or, if anyone has experience with 175 gr. or heavier bullets in the 7mm-08, please share your insights and experience.

I thank you all in advance for any direction you may give.

God bless you and your families in 2015,

MichiganMike

Wolfer
12-30-2014, 10:40 PM
I have a 7x57 which is very near same case capacity. 22 grs of 5744 gets me 1780 fps with the RCBS boolit. My soft alloy weighs 185 gr.
I haven't shot it from a bench at 100 yds yet but have shot several at various rocks and sticks from field positions and it appears to be quite accurate.

craig61a
12-31-2014, 04:55 AM
I have a few 7x57 mausers for which I'm getting around to developing loads for. In the past I have owned several Ruger 77 MkII's and the bores on all of them were slightly oversized. I still have one in 6.5x55 and it does alright for whitetails, but the groups are not the greatest. You might want to slug the bore and see what kind of dimensions you get.

scottfire1957
12-31-2014, 12:04 PM
Might be related to barrel twist rate.

cbrick
12-31-2014, 03:01 PM
The RCBS 168 bore rider is a great bullet IF the bore rider properly fits YOUR bore. Too snug and of course chambering will be difficult. Too loose and the nose WILL slump when fired. That's the first thing I would check. If the nose fit isn't really good a different bullet is called for. You'll never get the accuracy your looking for with a bore rider that only rides the bore on one side of the bore.

5744 should give good accuracy as long as your not looking for higher velocity. Like SR 4759 (same burn rate) that I use in both 7-08 and 308 keeping velocity at about 1950 fps accuracy is pretty good, try to step it up past that and not so much. If more velocity is needed a slower powder such as 4859/Varget/N140 will be the better choices.

Rick

michiganmike
12-31-2014, 03:12 PM
THANK YOU - for your replies. The rate of twist on the Hawkeye is 9.5. It does a great job stabilizing the 145 gr. Loverin. And according to the barrel twist rate calculator at http://kwk.us/twist.html, it should handle my heavier bullet.

MichiganMike

44man
01-01-2015, 10:21 AM
Calculator does NOT work. It will ALWAYS give a slower twist, it is just Greenhill.
Your twist is OK but as you increase bullet weight and length, you need to shoot FASTER and 5744 is not the best choice.
I fed in my .475 and it says I need 1 in 31" but it does 1/2" at 100 with a 1 in 15" rate. Looked goofy for my .44 saying I need 1 in 26" when 1 in 20" is where it works.