Ejcb

As below, unused A5, looking for £975 ono, buyer pays postage.

12 minutes ago, The Gun Pimp said:

I hate to see galled lugs. Bolt grease usually prevents it but grit could be the cause. Usually though if you have greased the lugs but a bit of grit gets in there, the shooter would feel it right away before it did so much damage.

Would you suggest the rifle would be safe to fire in this condition- I appreciate the photo isn’t excellent!

Hello all,

My friend and colleague’s Bergara HMR in 6.5 seems to have some gouges in the rear of the bolts locking lugs. 

I have not had a chance to inspect the action for similar.

He keeps them greased so am unsure what caused this - perhaps grit?

I advised him not to fire the rifle until he was advised otherwise by a suitably qualified armourer etc - however would like your opinion on this.

The second photo shows the gouges which to my eyes are significant. 

Thoughts?

Decent 3 shots at 1000 y from factory ammo and a semi half decent bit of luck on the wind 

1 hour ago, Kalahari said:

A 410 shotgun brush works in a 223 and may be cheaper.

 

David.

David - many thanks - considered this but will try and get one which attaches to my boretech rods

1 hour ago, Popsbengo said:

just a point on silica-gel.  It only works until its adsorbed moisture.  That can be quite quick - ie weeks not months.  If the cabinet is being opened and closed regularly it introduces moist air.  Silica-gel is best for closed cabinets where the dryer air is 'trapped'

Some types can be regenerated with a long low bake in the oven .  I have 2Kg of the type that changes colour when it's absorbed as much as it can - turns dark blue.  Bake it out and it's light orange.

Many packaging supply companies will supply large tubs of the stuff for peanuts.  I use loose weave bags (little sacks from eBay) to hang in the cabinet, let the air circulate, easy to fill and empty for regeneration.

A heater is ok but a dehumidifier is better, it removes the water rather than just raising the vapour pressure like a heater.

Many thanks for your feedback mate!

hello all,

here is the bore scope result.

it is limited to the base of the chamber witout any trace in the throat or lands etc.

Many thanks - will order a .45 for the 6.5CM chamber and a .375 for the .223 - I think?!

3 hours ago, Ronin said:

Cabinet heater such as a vivarium pad and something like VP 90 spray at end of cleaning is suggested 

Thanks ronin!

4 hours ago, No i deer said:

Stainless or chrome moly..?

Is it rust or brass deposits from the cases. Does it look a bit spotty looking in through the breech or are you using a borecam to view it more clearly..?

Every bore clean I use a 45 cal bisley bronze brush to keep the chambers clean.

Chrome moly - have a bore scope arriving so at present it appears to be rust - good idea on the brush!

Hello all,

have two Tac a1s, I keep them clean and looked after using boretech products.

however I recently discovered some light rust in both rifles chambers, the gun room and cabinet clearly has a humidity problem so will be shoving as much silica gel type products in there ASAP.

however, I didn’t expect this given I was using bore tech eliminator, which itself is recommended as a bore cleaner as well as an anti rust measure.

have read that EEZOX is a gold standard in anti rust, so will give that a try before putting the rifles away, and clean out the bore and chamber before shooting.

thoughts welcome!

On 7/12/2020 at 8:52 PM, KABOOM said:

21c isnt very hot and the primers look fine, maybe a sign of pressure? how was bolt lift and extraction? Possibly compare some factory ammo  and if its the same and no other signs as mentioned above carry on. best wishes for good shooting.

 

Hi kaboom,

bolt lift was fine, and the load is below the max load below:

Hi guys,

Managed to to test the 4451 / CCI450 / 147 ELDM / Lapua 6.5CM SRP brass combo at bisley.

I used a magnetospeed v3 on my 24" Tikka Tac A1 using an MK Machining mount, so the chrono wasn't attached to my barrel.

The wind 10 to 20 MPH from all angles, air and ammo temp was 21C, measured with a kestrel and laser thermometer respectively.

All loads grouped well despite the wind, so I focused on SD/ED and will shoot for groups another day in more favourable conditions.

The below 40.6 grain load had excellent figures, but is quite slow - however Tikka barrels can be known to be slow, however given the relatively warm ammo temperature of 21C, on a more common, cooler day I may see a lower MV, although the IMR Enduron range are meant to be relatively temperature insensitive - ( https://precisionrifleblog.com/2016/06/19/powder-temp-stability-hodgdon-extreme-vs-imr-enduron/#:~:text=That%20is%20very%2C%20very%20low,to%20large%20swings%20in%20temperature. - approx 68 FPS from -3 to 60C)

Unfortunately the other shots of the below series were not recorded, however they grouped very nicely at 600 and seem to have good SD/ES.

I did however notice some marks on the Lapua brass after their first firing, I am unsure whether this is brass wipe or smear from the virgin brass on the bolt face during fireforming, from bolt unlock and cartridge extraction, or from excessive pressure. 

In the picture below the 41.2 load cartridges have been arranged to place the ejector marks at the 6 o'clock position.

What are your thoughts?

 

Hi guys,

Managed to to test the 4451 / CCI450 / 147 ELDM / Lapua 6.5CM SRP brass combo at bisley.

I used a magnetospeed v3 on my 24" Tikka Tac A1 using an MK Machining mount, so the chrono wasn't attached to my barrel.

The wind 10 to 20 MPH from all angles, air and ammo temp was 21C, measured with a kestrel and laser thermometer respectively.

All loads grouped well despite the wind, so I focused on SD/ED and will shoot for groups another day in more favourable conditions.

The below 40.6 grain load had excellent figures, but is quite slow - however Tikka barrels can be known to be slow, however given the relatively warm ammo temperature of 21C, on a more common, cooler day I may see a lower MV, although the IMR Enduron range are meant to be relatively temperature insensitive - ( https://precisionrifleblog.com/2016/06/19/powder-temp-stability-hodgdon-extreme-vs-imr-enduron/#:~:text=That%20is%20very%2C%20very%20low,to%20large%20swings%20in%20temperature. - approx 68 FPS from -3 to 60C)

Unfortunately the other shots of the below series were not recorded, however they grouped very nicely at 600 and seem to have good SD/ES.

I did however notice some marks on the Lapua brass after their first firing, I am unsure whether this is brass wipe or smear from the virgin brass on the bolt face during fireforming, from bolt unlock and cartridge extraction, or from excessive pressure. 

In the picture below the 41.2 load cartridges have been arranged to place the ejector marks at the 6 o'clock position.

What are your thoughts?

 

Thanks for your input - appreciated.

my mates dies were fairly sooty, coupled with excess lube, most likely created the issue.

Gents,

just sorting through some 3 x fired Hornady 6.5 CM and noticed some striations on the shoulder of the cartridge.

i suspect this is from a poorly lubed case and the expander ball compressing it.

has anyone seen this before and have an idea whether these would be safe to fire?

6 hours ago, MrDuston said:

Hi you do know thy are £71 from spud 

I wasn’t aware, thanks for letting me know.

21 hours ago, MrDuston said:

Hi is the Brass small or large primer? 
Is the Brass boxed? 

Hello,

The Brad is large rifle primer, is unfired and  is in its original box.

Dies sold to Pengo, great guy to deal with.

Many thanks!

Ive measured my cartridge base to lands of my rifle being 1.815 inches

I’m going to try a 0.050 jump as some have had good luck doing so with the ELDM, resulting in my COAL being 2.378.

If I were to follow the data COL of 2.550, the 80 ELDM would be jammed 0.060 into the lands.

I appreciate there’s a line between reducing case capacity / increasing cartridge pressure as more projectile is seated into the case, however I feel the jam above would be the most significant culprit with regards to pressure.

Not sure how to proceed?

Hello all,

Looking to develop some loads with the following components, for a pair of Tikka Tac A1s in 6.5CM and .223

6.5CM - Virgin Lapua SR Brass, CC450 Primers, IMR 4551, Hornady 147 ELD-M

.223 - Virgin Lapua SR Brass, CC450 Primers, IMR 4166, Hornady 80 ELD-M

Cant find a great deal of load data, although the 4451 has been suggested as a 4350 replacement, and the 4166 to be similar to Varget.

Many thanks!

Hello,

Have the following for sale, will pay postage.

100 X Virgin Lapua .308 Brass - 75 GBP

100 X Sierra .30 155 Grain Tipped Match Kings - 55 GBP

SOLD .308 Redding Deluxe 3 Die Set - FL Sizing Die, Micrometer Seating Die, Neck Sizing Die and Hornady Custom .308 Case - 85 GBP SOLD

I think I used a teaspoon, having said that not sure why these patterns would come up as the rinse aid was fully dispersed prior to adding brass?

Hello all,

using a rebel 17 wet tumbler.

Use some soap and rinse aid sold by spud.

not sure if these are water stains, as these appeared after coming out of the tumbler.

there seems to be a water stained shape area where the brass is less reflective.

not sure what this is or if it matters!

4 hours ago, John MH said:

That hole should not be there, at some point someone has drilled that for whatever reason. If it shoots well keep it and enjoy it, but it's on longer original.

Thanks for the reply, as the hole doesn’t enter the chamber I’d assumed it would be safe to fire.

 I’m ignorant of the criticality of the hole and to what extent it may undermine safety.

Some have suggested that it isn’t safe to fire while others suggest it’s ok.

Unsure how to proceed, may have to get it sent off to proofhouse.

Thoughts appreciated!