It is possible that your POI (Point of Impact) might actually change with suppressor attached.

This is not always the case, but having changed the vortex flow (spiral) of gas/energy - it might actually alter accuracy by enhancing it - as well as several thread/surface issues on your existing rifle barrel.

It is vital that you fully test your new suppressor/muzzle-brake before attempting to take that opportunity hunting shot!

IMPORTANT! When sighting your rifle - it is irrelevant (to a degree :-) how close to the bulls-eye your shots are.

At this stage, we are looking for a consistent grouping of holes.

Once you know your rifle is grouping properly - you can then adjust your scope to bring the cross-hairs into the middle of your projectile grouping.

Sighting In a Rifle Scope

With your new suppressor mounted on your barrel - align and sight-in the rifle-scope as below:

1 - Ensure your rifle in UNLOADED - with magazine, bolt and/or any projectiles removed. 

2 - Mount your suppressor/muzzle-brake on your barrel, with a firm hand tension.

3 - Ensure your rifle scope is secure and level on your rifle, using a Spirit Level to obtain a true horizontal line.

4 - Ensure you are in a safe and appropriate location to shoot - with safe back-stop.

5 - It is best to either lay prone with bipods extended, or using sand-bags from a secure rest. Load rifle.

6 - Placing your cross-hairs on the middle of your target, breath in - pause - fire, then exhale. Do this three times.

7 - Now adjust your scope cross hairs into the middle of your projectile grouping.

8 - Repeat steps 6 & 7 at further distances, until you have reached your expected normal shooting distance.

Fault Finding & Diagnosis

If you suspect an inaccuracy with your suppressor - here are a couple of simple tests.

1 - As with the procedures above, shoot three shots into a target.

2 - If you suspect an inaccuracy - unload your rifle and rotate the suppressor 1/4 of a turn on your thread.

3 - Reload rifle and test again.

If your grouping has shifted this same amount around the target, then there is possibly a harmonic or alignment issue with your specific rifle. This is unusual, but it does happen.

Sometimes the thread of a rifle has become worn or is fractionally out of alignment with the suppressor.

With your rifle unloaded, you can also place a piece of masking tape across the hole at the end of the suppressor, reload and fire - determining the position of the projectile in alignment to the suppressor exit hole.

This usually occurs due to the similar circumstances above - worn or slightly inaccurate rifle thread.

Both these issues can easily be remedied by returning the suppressor/muzzle-brake to me (naturally at no cost to you :-) - where I will slightly hone the through-bore to increase the margin of tolerance.

There are basically two classes of suppressors that I make, 1 - upon request from a customer, or 2 - standard stock to sell.

The bore-tolerances (holes through the middle) of these two classes are slightly different. I have no control over the condition of the rifles owned by customers who buy my already made/stock suppressors, and for this reason I make the bore-tolerance of these suppressors slightly larger.

With custom made suppressors - I make the tolerance as tight as possible - meaning as quiet as possible.

The difficulty with both of the above, is if the tolerance are still too tight, or the thread of the suppressor and barrel are not perfectly matched - inaccuracies can occur.

It's important to understand, that the thread alone is not the only factor in alignment. In fact, where the suppressor and rifle barrel meet together - this is actually more important than a tight thread.

So - regardless of the reason, from time to time a customer reports an accuracy issue. Naturally, I sort this issue out - immediately, and for free - regardless of the reason (to be honest, it is sometimes difficult to find the cause, especially without actually having the rifle in my workshop.)

Anyway, I just want to keep everything honest - and assure you of my customer care and after sales service.

Warm regards

Rog