Received ibi barrel

Thanks for the tip, once my load dev 175smk is over, i'll compare with a 100 sampler pack of nosler and see.
Still sitting on over 500x 175smk's so hard to warrant a change right now.
And do believe i will achieve objective

Objective being, have a target in hand, with 5x 5 shot groups, all under 1/2 moa.
Once that is achieved, i will stop trying pushing limits of my reloading and tuning, and try to just shoot as much and in as much wind and far as i can.

Being only 3 shot groups and first visit, i truly believe the potential to constantly hold under 1/2 moa is truly there


Just reread your message, my 8lbs jug of varget is nearing the end and am about to open a new jug, i think will have to do a minor retest when opening new jug now


Mystic Precision said:
Great shooting. Fine tune at 200 to 300yds. Nice to see the barrel shoot so well for you.

Jerry
Click to expand...

Thanks! This easter will hit the range again as it should be quiet out there, will try the 43gr and 2 loads over/under with 5 shot groups.
If it repeats what 3 shot group gave me, weekend after that will be time to go out to 200-300 with a box full of the same load, with a labradar
 
I would suggest moving to 200 to 300yds next time out. Small errors can give you big conclusions at 100yds.. and some loads that shoot amazingly well at 100yds, don't further out. Spend more time plotting where the shots hit the target.

Each barrel is a story unto itself but I see some positives around load 4.

Obviously load #6 looks fantastic but speeds are a bit elevated.... but it will be very clear how things are shooting when you shooter further.

I would test 42.8, 42.9, 43., 43.1.. then 42.3, 42.4, and 42.5gr

Things might change as temps warm up and a couple of hundred rds go down the barrel. 4 to 5 rds per step would be suitable at this point.

Look forward to your next test.

Jerry
 
Alright will do it at 200yds next outing.
At EOSC i am limited to 200yds
Once my 200 testing is done i can pay for a Stittsville day pass and get to 300

I do also have a 550 on private land but with limited use


I am surprised by the 0.1gr increments.
But will try it as my load dev knowledge is somewhat limited.

Going in 0.1gr increments and playing around the 43gr and 42.4gr, i’m going to load 35 rounds for easter.
Plus 5 fouling shots, as i cleaned my barrel after last time.

I’m not usually a barrel cleaner, but last visit was cold and when i got back indoors, there was condensation on the barrel, i figured might as well very light clean and take minimal powder fouling out, didn’t touch my coppering.

Edit : is the 2725ish fps on group 6 considered elevated?
What would be target speed for 175smk’s if i had a choice?
 
Last edited:
MartyK2500 said:
Thanks for the tip, once my load dev 175smk is over, i'll compare with a 100 sampler pack of nosler and see.
Still sitting on over 500x 175smk's so hard to warrant a change right now.
And do believe i will achieve objective

Objective being, have a target in hand, with 5x 5 shot groups, all under 1/2 moa.
Once that is achieved, i will stop trying pushing limits of my reloading and tuning, and try to just shoot as much and in as much wind and far as i can.

Being only 3 shot groups and first visit, i truly believe the potential to constantly hold under 1/2 moa is truly there


Just reread your message, my 8lbs jug of varget is nearing the end and am about to open a new jug, i think will have to do a minor retest when opening new jug now




Thanks! This easter will hit the range again as it should be quiet out there, will try the 43gr and 2 loads over/under with 5 shot groups.
If it repeats what 3 shot group gave me, weekend after that will be time to go out to 200-300 with a box full of the same load, with a labradar
Click to expand...

Yeah, you really should recheck your velocity every time you change jugs. Varget (and all powders really) can have pretty big variations in it from lot to lot. Since your load is tied to your speed, just load up a sample of say 10 rounds at your chosen load with the new powder and test. If the velocity is off, redo a ladder to find the load that gives you your speed.
 
MartyK2500 said:
Alright will do it at 200yds next outing.
At EOSC i am limited to 200yds
Once my 200 testing is done i can pay for a Stittsville day pass and get to 300

I do also have a 550 on private land but with limited use


I am surprised by the 0.1gr increments.
But will try it as my load dev knowledge is somewhat limited.

Going in 0.1gr increments and playing around the 43gr and 42.4gr, i’m going to load 35 rounds for easter.
Plus 5 fouling shots, as i cleaned my barrel after last time.

I’m not usually a barrel cleaner, but last visit was cold and when i got back indoors, there was condensation on the barrel, i figured might as well very light clean and take minimal powder fouling out, didn’t touch my coppering.

Edit : is the 2725ish fps on group 6 considered elevated?
What would be target speed for 175smk’s if i had a choice?
Click to expand...

If you look on hodgdon.com.. and other reloading manuals, most 175gr loads max out under 2700fps.. Of course, there are loads slightly over and there are variations in barrels and chronographs so the "number" you see can vary. This is part of the nuance of load tuning.

Speed is important as a way to monitor internal pressures without pressure trace gear... and of course, help you figure out your drop table.

However, the target at distance is the best way to tell you how the load tuning is going relative to the needs of the barrel. I hope that you will see significant changes in the group orientation and size on your next trip at 200yds... and this will help you narrow down what load is best. And the best operating speed will be determined by this grouping.

I don't chase velocity, I chase accuracy... the speed is what it is and I have a scope that can let me adjust the POI to the target.

If you have a scale that can keep charges to within 0.02gr accuracy, you will see affects at distance using very small changes in powder. It is no different then the affect of small changes in seating depth.

Look forward to your results...

Jerry
 
10-4 thanks for the info.
I was only going with the fact that max load was going to produce heavy bolt lift, flattened primers, ejector marks on case heads, which i had nothing close of, even well into the 2800fps territory.

Got the FX120 as you know, so on that end of things i believe i'm all set.
My next load group is ready, i may not make it to easter and take an afternoon off for personal reasons!
 
Hi Scott, i will be honest this is something i have been pondering about for a good year now.
Knowing no one is these circles of shooting, wondering if a PRS styled rifle with a FFP scope would be welcome on the line.
To have browsed the rule book, i would guess my rifle would qualify in F-open.

Built this rifle with PRS in mind, but some injuries have been tough on me, so i even let IPSC aside for 2018 (this was a huge deal for me) as my weak hand cannot firmly grip the gun anymore.
Shooting off a bench or prone i am gtg, as my weak hand is only stabilising my sandbag, which doesn't require that much force.


Anyhow, these are pictures from my last visit, i wasn't even going to post them at first as it's not very good, but i expected poor results that day to be honest.
as #1, there we're some strong cross wind gusts placing the wind flag regularly at the straight 90 degrees position
and #2, at EOSC the 200M line is indoors, and guys we're stuffing the woodstove. They we're outside at the 100M line and wanted a warm place to warm up.
So i had to rest the bipod on the window opening, to try to minimize that crazy mirage going on. iirc, i had a reading of 32C indoors, and 3C outdoors.

Anyways not complaining, was a fun learning experience, it's just my 200M 5 shots load dev will be to start over as these results are flawed.

mydLuITh.jpg


TiqvPy3h.jpg
 
MartyK2500 said:
To have browsed the rule book, i would guess my rifle would qualify in F-open.

Built this rifle with PRS in mind, but some injuries have been tough on me,
Click to expand...

As for F-Class, the muzzle brake is a no go for either F-Open or FTR (just need to unscrew/remove it). Being a .308 Win, it would fit in FTR.
As it is, it should be good to go for the DCRA precision rifle discipline (not to be confused with the PRS), as long as it meets the trigger pull weight.
 
Shelldrake said:
As for F-Class, the muzzle brake is a no go for either F-Open or FTR (just need to unscrew/remove it). Being a .308 Win, it would fit in FTR.
As it is, it should be good to go for the DCRA precision rifle discipline (not to be confused with the PRS), as long as it meets the trigger pull weight.
Click to expand...

Mystic Precision said:
18lbs 2oz or lighter... no muzzle brake... you can shoot in FTR.

Jerry
Click to expand...


Thanks for the replies.
As is, i'm sitting at 17.6lbs
Muzzle break was loctited as i hate when these start moving after a few 100 shots, but my heat gun can fix this cleanly.

If i got this right.
FTR : remove the brake, find a thread protector 3/4x24, get a much nicer stable bipod but have to stay within 18lbs 2oz
DCRA precision rifle good to go as is, as long as trigger pull meets the rulebook. I'm sitting at 1.8lbs where does that stand? It's adjustable, and i had shot over 1000 rounds with accutrigger at 2 3/4 so no issues bumping up.

Connaught has DCRA precision rifle? I imagine the discipline must be similar to f-class, as in staying prone in a square range? Given my condition right now, this is what i am actually aiming for, as long as it's not action oriented for now.
 
If you are 17.6lbs with the harris, swapping an MPOD will not change your overall weight. Adding the T slot rail will be another oz.

Electrical tape around the muzzle threads... simple since you are going to put the brake back on. I am surprised you needed loctite.

If the chamber allows and you are going to 900m, you may want to consider a heavier bullet. We can discuss... send me an email.

Thanks

Jerry
 
Will send an email once i get everything sorted out.
Ideally, i would prefer a time slot or shooting discipline allowing my brake, it makes that rifle smoother to shoot than certain non-braked .223 bolters i have tried.

With this one i did not try without loctite.
On factory savage barrel, the 5/8 std 308 thread brake, would come loose every 100 rounds until i loctite it.

For this one, i hand tight and got perfectly indexed, once loctite is dry i could get brake lock nut extra handtight, with a final 1/8 turn using pliers, without brake changing index.

Old and new speaking of insite arms heathens brake.
 
6 or 7
As previous testing showed promise for the 43gr load, i had loaded a few more of that one to plink with after testing, and gave that group an additional shot or two just because testing wasn’t relevant that day.
 
I wasn't suppose to revive this thread, but today's outing made me think this barrel has huge potential, i just haven't found out how to tap into yet.

Decided to go to EOSC in a hurry, and i had not loaded any ammo.
Still had some savage barrel testing ammo on the shelf, with different Ogive lenghts, powder charges etc... changed barrels before having the chance to test. I was keeping them for this ocasion, when i'd be in a rush and just for s***s and giggles.
What they have in common with my current loads, are components, still Lapua brass, CCI BR2 primer, Varget, 175 SMK.

This was my best group today
200M, nice calm conditions, 13-14C, 5 shot groups.
Most we're 0.5/0.8 moa (good considering it's ammo not intended for this barrel), one stood out in particular.
Being a 5 shot group, i do not believe this is a fluke.
My savage barrel had a very short throat, so this same round in my IBI barrel, ended up being at 35 thou jump, which is a jump i still have not tested as i like to go around 15-20 thou.
At least i had kept data on ammo, seems with a single result like this, it warrants the motivation to continue testing ammo lenghts and charges.
Shot from harris bipod, 200M, on carpeted concrete table.


2MlcGGrh.jpg
 
Make up more of this load.. test again.. if it repeats, stop testing and just enjoy the barrel.

That is 1/4 MOA at 200m... call it done if it repeats. Nice shooting. 3X5rds and average the results...

If you really want to test, make up some 0.1gr below and above and do a round robin test. I doubt you will see any improvements in either vertical or windage. That is the limit of the rifle system

Jerry

PS, after the barrel has seen 200 to 300rds, it may need a slight tweak.... then just load up more and enjoy the next 2500rds.
 
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