GS Moly Coated Bullets

[Gerard Schultz]

Mark,
What would be the tightest twist barrels readily available in .284 and .270? That would determine how long the bullet can be and how high the BC can go.

Never under estimate the capability of a well designed expanding mono. We have seen that a 40gr HV from a 22-250 is capable of reliably taking game in the 500lb class at distances to 400m. On record we have 17 Gemsbok and 2 Black Wildebeest. All these shots were pass throughs as well.

The longest shot we know of with a 7mm RM and the 130gr HV was taken on a Black Wildebeest at just over 700m, also a pass through. We have a number of 500 to 600m shots with that combination on Kudu.

These shots were taken by professional hunters or men who shoot game for a living for market.

 

[MontanaRifleman]

According to Lilja's site, a 7 twist is the tightest for the 284 and an 8 twist for the 277. My use would be non dangerous game from a down range velocity of 1600 fps and up. Checking your site, it looks like you are calling for an 8 twist for the 284/140?

Lilja Precision Rifle Barrels - Caliber and Twist Rates

I ran the numbers on the 284/140 HV using an MV of 3700 fps (7mm RUM) with a BC of .480 @ 3000 ft elevation and found the momentum at 1000 yds to be about 38 ftlbs. That seems marginal to me for good penetration on a 900 lb elk, but I dont know for sure, just a guess on my part. Also, a Berger 180 gr bullet launched at 3200 fps, with a BC of .659 will get to 1000 yds with 50 ftlbs of momentum and will get to 1150 yds with 1800 fps+ (minimum expansion vel) and 46 ftlbs of momentum. So for a 284 cal bullet, that's the go to bullet at the moment for me.

 

[MontanaRifleman]

Never under estimate the capability of a well designed expanding mono. We have seen that a 40gr HV from a 22-250 is capable of reliably taking game in the 500lb class at distances to 400m. On record we have 17 Gemsbok and 2 Black Wildebeest. All these shots were pass throughs as well.

That is quite the performance for a 40 gr bullet. If I posted this on another forum I know of, it would rufflle a few feathers

 

[Gerard Schultz]

This is the Black Wildebeest taken at a ranged 345m with a 22-250 and a 40gr HV. I realise it is not a long shot in your terms but it points to what can be done.

The bullet entered on the shoulder

went into the thoracic cavity at the second rib

punched through the top of the heart

and exited at the fourth rib.

Nice pass through with good damage where it matters.

I will keep the thinking cap handy and take a serious look at expanding long range bullets towards the end of the year. The current project is to finish up the SP range and do some field work on game with them.

 

[Lightvarmint]

Gerard,

It has been two days and I haven't heard back from Gina yet. Is she not available to answer emails?

James

 

[beartooth]

GS HV's 100gr in my 257Wby Accumark shooting very well and consistently also the 150gr GS HV in my Mark V Custom shooting very well.

257Wby Accumark

Mark V Custom 30-06

The 06 does shoot the Sierra HPBT a tad better at 2933fps

 

[MontanaRifleman]

Hey Beartooth, fancy meeting you here, those pics look familiar

 

[MontanaRifleman]

Gerard,

Thanks for all your input. I would definitely like to try some of your bullets, but would need to get a barrel for them. There's a chance I may get a 7mm - 338 Lapua put together this summer and if I do, I'll get a 7 or 7/12 twist for it and it will probably be about 27" long.

Best of success with your testing and development. I'll be in touch if I need some bullets.

Cheers,

Mark

 

[beartooth]

Yea, a friend told me to come and read this thread on the GS and I saw that you started the tread and so I posted the results of the 257Wby and the 30-06 using the GS. I posted here a long time ago when I came here to ask a question which the guys on this forum were more than able to answer. Lots of good stuff on this forum. Been reading on it now for over an hour.

 

[MontanaRifleman]

Yep, IMO this site is *the* place when it comes to LR shooting/hunting. There's a ton of good knowledge and experience here.

Keep us posted on your GS testing

 

[Gerard Schultz]

James,
We are both a bit backlogged on email but I will ask her to look out for it.

I think I need to visit here regularly, there is much to learn here.

Thanks.

 

[Buffalobob]

I think I need to visit here regularly, there is much to learn here.

Gerard

Those are very nice autopsy pictures that allow the reader to see exactly what occurred with the animal. People here could learn some things from you.

It is also interesting to have hunting reports from some of the other continents.

 

[Master Diver]

Gentlemen,

Here is a picture of the GS Custom SP bullet in ca. .338 this is a 232 grn version well suited for a rifle with a 1:10 twist.

Cheers,

Master Diver

 

[beartooth]

That is one awesome and beautiful bullet.