New load development after barrel broken in…

[Chris11]

Hi guys,
Random one. far from an expert in reloading but seam to get some great results over a few calibres.
Now I’ve done home loads for my 6.5cm not long after getting the rifle brand new, got sub 1/2 moa.
after the loads run out around 30’rounds then went onto factory ammo as I didn’t have time to reload, now I’ve shot probably 200 rounds with factory Gone and done the homeloads off previous days to find the grouping awful ?
Would breaking in the barrel as such make much of a difference ?
Ps factory ammo is still accurate
Thanks

 

[palo]

Factory or custom barrel ?
When I had my rifle rebarreled my riflesmith told me not to do load development until I had around 100 rounds through it as the barrel would speed up with use.

 

[Stalker-of-the-deer]

Have you cleaned it?

Helps to a clean barrel and keep to one brand of bullet

 

[Chris11]

Have you cleaned it?

Helps to a clean barrel and keep to one brand of bullet

Yeah I clean it after every use.

 

[Chris11]

Factory or custom barrel ?
When I had my rifle rebarreled my riflesmith told me not to do load development until I had around 100 rounds through it as the barrel would speed up with use.

Factory barrel mate, blaser r8
Yeah I think that’s what I’ve read hence why my load would now be different. Just wanted to see if anyone with a little more knowledge than myself knows

 

[Stalker-of-the-deer]

Yeah I clean it after every use.

Personally I I just pull through mine after every outing and clean woth boretech once groupings open up.

May just need running back in with your ammo

 

[Mr B]

In my experience Blaser barrels have rarely been very fussy about what they shoot, not sure what others’ experience is. Perhaps you’re keeping it a bit too clean?

 

[Edinburgh Rifles]

What Load data for homeloads including OAL?

Were the homelands you shot before and lately made at the same time?

 

[NP435]

After 200 plus shots that barrel is as broken in as it can be. You might look at your home loads in terms of charge weight consistency. Are the projectiles suited to the twist of rifling?

 

[Dickie]

If factory ammo is still accurate you’ve answered your own question that the reloaded are the issue.
Start from scratch is the answer.

 

[Sniper308]

What powder what bullet powder charge are you using?

 

[Chris11]

Using Winchester stab all 6.5 with Hornady cases and swift scirocco heads not sure the oal of the top of my head but obv used a comparator and dropped then a little off the lands was getting groupings virtually though the same hole.
Yes all made the same time. Only had a handful left so went onto factory as I was going out to Ireland and didn’t have time to reload a new batch.

 

[Sniper308]

First thing I would be doing is getting the chronograph out to see if it’s consistent, it may be the fact your seating depth may need adjusting

 

[trickie]

Sadly Chris, this (to me at least) reads like your reloading technique is far from consistent.
I would:
Start from scratch then progress, as normal.
If the factory ammo shoots well the you can take some of your data from a once shot round, that’s always a good start.
There are lots of very good reloading videos (and as many if not more poor ones) on the tube of you