Popsbengo

try 300gr Lapua Scenar

What twist rate and length ?

2 hours ago, martin_b said:

I'm picking up my rifle tomorrow after its had a new barrel fitted. 

The old barrel went south pretty quickly, ( operator error and old age it turns out), so my problem might be I have 500 rounds of identical hand made rounds ready and waiting, what if my new barrel doesn't like the load? Can you use a barrel tuner to tune a barrel to a specific load, or if the 2 aren't a match do I have to pull all the bullets  and start again?  (obviously I give the barrel a chance to break in first)

It's a controversial subject, some say "works a treat", some say "snake oil" and then views in-between.

Barrel break-in is another subjective view, at least for a quality target barrel like Sasson or Bartlien.

😑

28 minutes ago, Jimbob22 said:

Could the neck thickness be thicker and require neck turning?

 

 

 

 

no.

14 minutes ago, Geezedtee said:

Emulator? Would it work on a Mac as well?

Android phone apps will run on BlueStacks and there's a version for Mac OS.   However I found it better to dual-boot my MacBook and run Android on Windows 10.  I had to set this up to run Quick Load anyway.

39 minutes ago, Ralpharama said:

I’m not a great lover of shows and only go to the CMM show in October as I feel I should as a contributor and also to see the boys in the Z1OC. Sometimes I get roped into sticking a bike in the club stand. on the twentieth I’ll be playing with my No4 and .223 at Bulford with the fine lads at Wessex. 
DVLA have finally given in and allowed me historic status on The Beast (Z1300) so she’ll be getting plenty of outings this summer  

You going to the October show?

Hope to.

I use 'Applied Ballistics' app (cheap and simple) and a bog standard Kestrel for close wind and experience for down range wind.  No problems so far.  A little bit of pre-planning for G7 data (readily available).  I've tried other apps and they all do roughly the same thing.

There's no substitute for developing your own dope,  I keep a log book and irrespective of weather conditions ballistic settings for drop are usually close.  For example I dialled my previous settings at my last Eskdalemuir outing in February and first shot hit at 1550 with .338LM.  That'll do.

Elevation is physics and amenable to calculation however windage is part physics part black art.  There's no substitute for developing the necessary wind-reading skills.  Unfortunately field ranges like Eskdalemuir have next to no wind indicators  - the best usually being your (or your mate's) last shots.   I'm yet to see anyone achieve much with taking a wind reading at the firing point and nothing further for +1000yds!

With regard to Quick Load,  I have just purchased a copy and find it useful when considering a new powder.  Is it 'invaluable'?  Not in my opinion.  It's also only as good as the data you enter - I've just run some 5.56 simulations and the QL data for NATO brass and Sierra MK dimensions do not line up with actual measurements of components in hand so inputting one's own data is necessary.

By the way Ralph, are you going to the Stafford Classic Bike show on Saturday 20th ? 

6 hours ago, furrybean said:

In .308 I use the Shooting Shed system which I really like - but now hes retired what is a good alternative? Ive got the hornady which is fine but is there anything better out there?

I like the anvil/cup of the SS

Better ?  How better?  More accurate or easier to use?   After all that last 0.001" makes such a difference 😁

I use a Hornady gauge with the better Sinclair steel insert for bullet comparison and the Hornady alloy inserts for case shoulders.  Seems to work very well, easy and quickly adaptable between calibres.

58 minutes ago, BoltHead said:

The rear sight is a Swenson. I had an identical one that came factory fitted on a new Swing mk 4.

George Swenson designed the Swing rifle, which is where the Sw in the name comes from.

That's great, thanks.  I did wonder as there's no stamping/engraving as would be likely for a OEM make

I have some TR sights that I've inherited that I can't ID.  The eye piece and foresight are Gehmann  however I have no idea what age/model etc.

The mount adapter plate fits a Swing 7.62 TR rifle circa 1970's.

Any thoughts on make of sight and or model numbers of the eye piece and foresight would be most helpful.  If anyone has a view as to value that would be a great help

1 hour ago, mark rug said:

Morning all.I used the last of my old ammunition for my .22/250 during the winter.H380 powder 38gr. Norma brass Nosler 55gr ballistic tip bullet.CCI large rifle primer.A good accurate load it was too.So i chose Viht n140 Magtech large rifle primers vmax 55gr bullet and some brand new Lapua brass.Got the load data off viht web site.I started at well below max and ended at .5 of a grain below stated max load.Well thats where things went downhill.1.5 inch low and .1.5 inch spread at 100yds.But the thing that bugs me most is the soot on the case necks and on the crown of the rifle after i removed the mod.Im thinking short powder charge but i checked and rechecked the loads they where all as per stated on Vhit web site.Do any of you guys have any thoughts you could share please.cheers.Mark.

Lyman 49th Handbook doesn't list N140 as an option, rather they prefer N150 for 55gr A Max (they don't list your specific bullet).  Their max for N150 is 36.5gr with an expected MV of 3663 from a 24" barrel.

2 hours ago, Ralpharama said:

I’m trying to achieve the best bipod/rear bag combo for shooting my new AXMC .338. Currently I’m using a super heavy rear bag and my old faithful tier one FTR bipod. I am concern the heavy .338 loads are a bit much for the FTR bipod?

I’ve been considering an AccuTac HD50 with an extender and the fortis micro adjustable rear, but have been put off by it being in plastic. Am I being a bit pessimistic, but it seems a lot of money if it’s not going to last. 

I’ve also been looking at an adjustable bag rider, but the adjuster is ‘masked’ by the ears of my bag.

i’ve been agonising over methods of fine adjustment to take my own inabilities out of the equation to achieve accurate long range shots! A small amount of error is a big error at a mile 🤣

I use a Tier 1  FTR rest with ski feet on a rubber covered board and a heavy bag (chromate sand).  Shot hundreds of .338 rounds with no issue and decent accuracy maintained.  The rest is still as good as new.  I'm not so much but that's just age....

Have you considered actually writing to S&B and asking them?   We had very good feedback from CCI in response to an email enquiry.

bugger !

I'll take them please George, I'll PM you

In answer to your OP It only requires a few thou to create the "off centre" zero you report.  A combination of ring and rail (or dovetail, you don't mention either),  can easily set the scope "off".

Plus one for a Spuhr mount.   Expensive but there's nothing better.

26 minutes ago, shooter83 said:

It's not a typo..I found quickload to be way off. Dangerously off i'm. glad I went with user recommendations and started at about 82 grains and worked my way up. The highest I went up was 86grains and got stiff bolt lift. The speeds are measured using a magneto speed. I can assure you it's not a typo. I wouldn't rely on quickload. Hence why I always ask people what their loads are and how they are performing. Quickload is way off with rs powders. With vihit it was odd by 1 to200fps etc . I dont trust it with rs powders 

Just used Geoffrey Kolbe's ballistic app;   guess what - 2768fps with the same data inputted.

I suppose he could just be wrong too ?

I'd take your load data with a pinch of salt unless someone else has similar performance to report.  If it were me, I'd check the calibration of my scales.

20 minutes ago, shooter83 said:

Quarter MOA when load testing in the the tunnel at 100yards. 

Thought I'd share me 900yards group for a more real world group. As the fella wanted to know how the smks fair with the .300NM

I see.

I've just run your load through Quickload for interest as I've been toying with 300NM, re-barrelling my .338LM

29.5 inch barrel, 1:8 twist RS76 83.4gr  Sierra MK 220  Is that correct ?

That gives a case fill of just 84% and a resultant MV of only 2799fps. 

Assuming a typo for powder quantity  (for the purposes of sandyb's question)  and trying 93.4gr (94% fill and 3110fps MV)  - that gives a highly dangerous over-load so I'm pretty sure that can't be what you're using.

So how do you get 3120fps ?

17 minutes ago, shooter83 said:

.300NM is a great round once you tune it. The 220 SMK with 83.4 grain rs76 give me 3120fps and quarter moa. Id get rs powders. Availability seems to be better. Rs76 or 80. The group to the right is a 6 shot group at 900yards. 

how's that 1/4 moa ?   

Here's an opportunity to have your say regarding the de-regulation of controls on sound moderators.  It take less than 5 mins.

https://www.homeofficesurveys.homeoffice.gov.uk/s/M2F0UW/

45 minutes ago, Richiew said:

Should have made things a bit clearer. I’m using N135 at 42.5 to 43 grain for 155s and 44.5 grain s of N150 for the 175 and 185 Berger s . N150 at 44.5 grain also works well with hornady 178 eldms.
45 to 46 grain of N150 became compressed at factory loaded lengths .

Above loads at 2.234 “ base to ogive in an AI AT 

ah, that makes sense now !

4 hours ago, Richiew said:

Hi there 

just some info regarding powder for the 155 s . I’m using lapua cases and struggle about the 46 grain mark before it’s full with n150 . 
from the web viht quote upto 50 grain to get 2900 fps . Might be worth trying n540 as 2900 is got using 44.6 so more likely to get the speed with normal fill s . 
No idea about primers but might be worth having a trial with a known good load with the magnums and see how they perform. 
cheers

N150 is a bit slow for 155gr bullets.  N140 is probably a better choice.  N540 is a bit of a barrel burner and I find N140 to be just right.

I use 155 Scenar with 43.5gr N140 with Lapua brass and BR4 primers.  2750 fps from 24" 1:11 barrel - good enough to be accurate at 1000yds if the wind's not blowing.    I use N150 under 185gr Berger Jugs.  and that's excellent

ttt

Hi

I have a Lee press (used but in very good condition) and a set of Lee powder scales (new, never taken out of the box)

Press  £45  plus p&p

Scales  £20  plus p&p

Pick up from N. Staffs for free.

16 minutes ago, foxyloxy said:

Hi all.

I've a query for those in the know. For those using ultrasonic cleaners, what chemical / cleaning products would you reccomend for - 

A - dirty gun parts.

B - cleaning brass.

All the related posts ive found seem to be 4 or 5 years old now, I'm guessing there's new products on the market nowadays. 

Thanks in advance. 

This is brilliant for brass in an ultrasonic.   https://www.carbusonic.co.uk/-ULTRASONIC-CLEANING-FLUID-JEWELLERY-JEWELRY-WATCHES-TATTOO-DENTAL

I drain down and let it stand for a day or so, poor off the clear and dump the crap - top up occasionally.

Their carb cleaner does steel parts well but so does dish detergent in hot water