Have LW Poly Barrels in .177, .20, .22 & .25 Cal. - Need a few oversized slugs for Slugging these barrels?

[SpiralGroove]

Hey Guys,
Want to slug the above barrels to find an exact fit for shooting slugs.

- Does anyone sell slightly "oversized slugs" in these calibers so that one can slug their barrel (hence determine the exact bore diameter before buying slugs)?

 

[iAMzehTOASTY1]

If you are going for oversized; I've a few tight fitting pellets/slugs in my collection.
But I only have .177 and .22
Hope it still helps though

View attachment 20220905_174334.heic

View attachment 20220903_163217.heic

 

[nervoustrig]

Just place a slug upright on a hard surface and give the nose a tappy tap tap with a hammer.

Start with a light tap, measure the diameter with calipers, and tap again with increasing force until it's the size you want.

 

[SpiralGroove]

Thanks Jason - That's a simple/cheap technique anyone can love.
- Now, why didn't I think of that?

 

[SpiralGroove]

Guys,
Have gone to the Barrel Outlet's (GS) twist calculator which suggests .177, .20 , .22 and .25 cal. slugs traveling at 950 fps have a twist rate of NO LESS 1 every 11". This seems a very fast twist rate ... much faster than the OEM RAW HM1000x, which I believe is 1 every 17.7".

Twist Calculator

The Barrel Outlet's Barrel Twist Calculator Calculator is a tool for determining the Gyroscopic Stability (GS) of your bullet and is based on the Don Miller twist rule. (Learn More). This calculator is used to find the optimal twist rate for your bullet. This is a general information...

thebarreloutlet.com

What am I missing?