Testing new Long Range rifle.

[LongRange]

A couple guys have asked so today was the first test of my new rifle, I didnt push her too hard but heres a few numbers. .270cal 130gr Barnes TSX (yes hunting bullet) @3890fps avg. 85.5gr H1000 , partent case 300WBY. Mcgowan 34.5" Barrel , Lawton 7000 action Double Nitride. Jard 1.5lb Trigger, Millet TRS 6x25 , 35mm tube. Choate Ultimate Sniper stock, Harris bipoid. Heres a 4 shot group @420yrds today, was a bit windy. I shot a few more with basically the same results so far I am very pleased.

[farmerj]

Nice cold bore

[LongRange]

TY sir, Tried to keep the build down to 17lbs, and still in world record contender class so wasnt easy, only further testing will tell as with any new caliber, there is zero load data out there especially for this type of setup and barrel length.

[OldmanFCSA]

You may find that the bipod may need to be modified to obtain better accuracy.

Dual springs, stronger springs, tighten pivots to barely being able to move, and preload the bipod by pushing forward against it.

Just a few ideas we use in FCSA Hunter Class competition.

Great shooting. Keep up the good work !!!!!!!!!!!!!!!!!11

[LongRange]

good advice TY, I will test that out, right now shes only pushing about 12.5lbs of recoil so it doesnt move much as is and the front stock ramp design keeps the bipod pitched well.

[farmerj]

Proper use still suggests preloading the pod.

[Rip Van Winkle]

Wow! a 130gr bullet at almost 3900fps. What kind of barrel life are you expecting with this set up?

[LongRange]

Wow! a 130gr bullet at almost 3900fps. What kind of barrel life are you expecting with this set up?

well I am hopiung for a solid 800-1000 rounds, barrel life really depends on not only how many rounds but the way in which you fire it, If you just sit there dumping rounds thru it with a hot barrel it wont last long in any magnum caliber, but if you shoot and chill shoot and chill, a barrel can outlast you. I have used Nitrous Oxide to chill marrels many times before when pushing one of my rilfes thru hot barrel shooting or hot weather shooting just to save my barrel. My barrel was cryoed thru its entire cut and is a 1:11 twist, so not going to create the heat that a standard barrel would. We are still at the testing stage, I would like to try and level out some accuracy over 4200fps which should give me 5500lb ft of energy, but until we push her a bit harder its just a pipedream. I will keep ya posted and try and get some chrony pics for ya.

[Rip Van Winkle]

Yeah, 800 - 1000 is about what I'd expect, that's one of the reasons I don't chase the holy grail of velocity. I get around 4000 to 5000 rounds out of a service rifle barrel and that seems to pass too quickly.

Whose barrel are you using?

ETA: Never mind, I reread the OP. "Mcgowan 34.5" Barrel"

[RAGGED]

Serious question, what’s the intended purpose of the rifle? Just a fun project?

[FJ540]

Serious question, what’s the intended purpose of the rifle? Just a fun project?

Why, you feeling inferior with your 7mm Mag now?

Cool gun, and great group!

[RAGGED]

Serious question, what’s the intended purpose of the rifle? Just a fun project?

Why, you feeling inferior with your 7mm Mag now?

Cool gun, and great group!

No, not at all, I'm still the self-proclaimed unofficial winner of the MNGT rifle challenge, you know, the targets that were shot with a witness

[LongRange]

Serious question, what’s the intended purpose of the rifle? Just a fun project?

Well actually the purpose is not just for the cool factor, I enjoy shooting a bit further than most folks and am looking for a better long range lethal caliber than the current offered rounds. I am stubborn and not willing to accept that the best is a 33 ,40,50cal round that drops like a lead fart.
Currently in comparison to the .338 Lapua( 2969fps - 4893ftlbs- @ muzzle), which at 1000 yrds and a 250gr round has specs of 1738fps and 1678ftlbs of energy.. and bullet drop of 260", while this round(4190fps- 4705ftlbs @ muzzle) at 1000 yrds has specs of 2743fps and 2005 ft lbs of energy from a 120gr round ... and bullet drop of 128". At further distances the gap is even greater. The 338 Lapua is.. er WAS considered the best sniper round from 600-1500m, although loads from the 30-378 have beaten it in many areas. I think with further testing this round could turn out to be a very solid contender for tops in the long range field.

[RAGGED]

Well actually the purpose is not just for the cool factor, I enjoy shooting a bit further than most folks and am looking for a better long range lethal caliber than the current offered rounds. I am stubborn and not willing to accept that the best is a 33 ,40,50cal round that drops like a lead fart.
Currently in comparison to the .338 Lapua( 2969fps - 4893ftlbs- @ muzzle), which at 1000 yrds and a 250gr round has specs of 1738fps and 1678ftlbs of energy.. and bullet drop of 260", while this round(4190fps- 4705ftlbs @ muzzle) at 1000 yrds has specs of 2743fps and 2005 ft lbs of energy from a 120gr round ... and bullet drop of 128". At further distances the gap is even greater. The 338 Lapua is.. er WAS considered the best sniper round from 600-1500m, although loads from the 30-378 have beaten it in many areas. I think with further testing this round could turn out to be a very solid contender for tops in the long range field.

In the spirit of legitimate debate I’d have to disagree with your logic, anyone who shoots at longer ranges knows ballistic drop over a distance is in fact the easiest variable to work with, in fact its not much of a variable with modern range finders, mobile ballistic apps and accurate chronographs. In long range shooting the true variable is the wind as its almost impossible to peg correctly over the entire distance the bullet travels, that’s where the true skill comes in and that’s where the highest chance of error can occur, that’s why a bullet with a great BC is an absolute must when looking for long range accuracy. While I agree you got a flat shooter it’s a dog in the wind, at least with the load posted above (I’ll even spot you the 4200 FPS you are hoping for) . Your load would have about 66.5” of wind drift with a 10mph full value cross wind, and I come up with 159” of drop from a 100yd zero, contrast that to my 338LM load (300gr SMK @ 2750 FPS) which only has 35.5” of wind drift with the same cross wind. At 1500 yards that spread is even worse, your load would have 186” of wind drift where as the 338 would be 87.5”, energy again goes to the 338 Lapua by a landslide, 346 ft lbs for your load, 1492 ft lbs for my 338 load.

Your numbers are not jiving with the 4 programs I have access too. I get much much less than what you are claiming, using a 130gr Barnes TTSX in .277 cal (.392 G1 BC) and your 4200 FPS numbers I’m coming up with about 900 ft lbs of energy @ 1000, not the 2005 you are claiming, also I come up with around 160” of drop @ 1000, not the 128” you have, something is not right, am I missing something? I confirmed these numbers using JBM, Bullet Flight, Ballistic FTE and the Sierra software. My 338 LM has 2330 ft lbs of energy @ 1000. No disrespect but again it appears you are playing fast and loose with your data, what gives man, we are all gun guys here, no need to try and shine up a turd, Sam or JJ or anyone else run these numbers and let me know what you come up with, I want to know if I’m loosing it or not.

[Dutch]

Still, very nice. Proficiat!