Many thanks!! I really like your videos have been very helpful.

@CopperStarPrecision

2 ай бұрын

You are welcome!

Priceless! You've answered the question I always wanted to know but was afraid to ask ;)

@CopperStarPrecision

2 ай бұрын

Happy to help!

Thanks for the video you cleared it up better for me. I have a lilja barrel coming in this week and will need to do this. Also nice base class build I just jumped up to open this year but will be keeping my pro varmint as a base class gun after nationals next month.

@CopperStarPrecision

2 ай бұрын

I think the Lilja prefits come with a 1.200" shank length with barrel shims. If you know the bolt face to action face distance you can set the headspace to the ammo you plan on using. Next video will be about measuring rim thickness.

Thanks for sharing! 😊 I need to get one of those gauges 😉

@CopperStarPrecision

2 ай бұрын

Any time!

Fabulous information and explanation.

@CopperStarPrecision

2 ай бұрын

Glad it was helpful!

@fredshebester-wg4vb

Ай бұрын

@@CopperStarPrecision You info is always helpful

looking at the prs basic class, would you recommend the cz 457 or the ruger precision. have not shot this dicipline before. many thanks Bill

@CopperStarPrecision

2 ай бұрын

9 out of 10 of the top production class competitors from last year's finale were using the CZ 457 MTR. I think any CZ 457 that fits you well would be the way to go. The MTR at $849 MSRP and the Bushnell Match Pro ED at $749 MSRP puts you just under the cost cap for Production class for PRS Rimfire and is a killer combo (but it will put you in Open class for NRL22).

If you measure this and find that the difference does make a difference in accuracy do you then batch the ammo accordingly? Then if so would you make the changes with bolt shims verses barrel shims for a quicker fix? I have heard this for years and I have even when loading for high power competition we would weigh each bullet, case, etc. to all match our desired needs. We did see a difference in our 600 yard shots…not so much on 300 in.

@CopperStarPrecision

Күн бұрын

Weight sorting is difficult with rimfire since you don't know if the source of the discrepancy is due to the case, projectile, powder, or priming compound so I don't bother. For competition I try to stick to the match grade ammo (Lapua Center-X, Midas+, SK Rifle Match, Eley Match, Eley Tenex) which has shown to have very consistent rim thickness across a box/brick/case. I do not yet sort by rim thickness, but might start doing so for my benchrest rifle, not my PRS/NRL22 rifles. Where I do see some potential (I am still testing and will release videos when I have conclusive findings) is to match the headspace to the rim thickness of the particular brand of ammo that you intend to use for competitions. Bolt shims decrease headspace and Barrel shims increase headspace. With my headspace of 43-43.5 thousandths it is well suited to the Lapua/SK brands. I see some marginal benefit to adding shims to get the headspace closer to 39-40 thousandths when using Eley ammo (still testing this out).